certstmt_10dccmt17b12609.htm - Generated by SEC Publisher for SEC Filing

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STATEMENT TO NOTEHOLDERS

September 17, 2026


TRANSACTION PARTIES


Depositor:	Citigroup Commercial Mortgage Securities Inc.
Master Servicer:	Wells Fargo Bank, National Association
Certificate Administrator:	Citibank, N.A.
Special Servicer:	LNR Partners, LLC
Trustee / Custodian:	Deutsche Bank Trust Company Americas
Asset Representations Reviewer /
	BellOak, LLC
Operating Advisor:




	Danny Lee	Citibank, Agency and Trust
	(212) 816-4936	388 Greenwich Street Trading, 4th Floor
danny1.lee@citi.com		New York, NY 10013


TABLE OF CONTENTS


1.	Distribution Summary	2
1.1.	Summary	2
1.2.	Factors	3
2.	Distribution Detail	4
2.1.	Interest Detail	4
2.2.	Interest Shortfall Detail	5
2.3.	Principal Detail	6
3.	Reconciliation Detail	7
4.	Other Information	8
5.	Stratification Detail	9
6.	Mortgage Loan Detail	14
7.	NOI Detail	16
8.	Delinquency Loan Detail	18
9.	Collateral Performance Delinquency and Loan Status Detail	19
10.	Appraisal Reduction Detail	20
11.	Historical Appraisal Reduction Detail	21
12.	Loan Modification Detail	25
13.	Historical Loan Modification Detail	26
14.	Specially Serviced Loan Detail	33
15.	Historical Specially Serviced Loan Detail	34
16.	Unscheduled Principal Detail	39
17.	Historical Unscheduled Principal Detail	40
18.	Liquidated Loan Detail	41
19.	Historical Liquidated Loan Detail	42
20.	CREFC Investor Reporting Package Legends	43
21.	Notes	44


Reports Available at sf.citidirect.com	v. 21.09.28	Page 1 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

DISTRIBUTION SUMMARY

September 17, 2026


										Accretion
										&
										Non-Cash
				Accrual		Other				Balance
	Original	Prior	Pass-Through	Day	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/	Current
Class	Balance	Balance	Rate	Count	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)	Balance

A-1	21,308,000.00	-	2.008000%	30/360	-	-	-	-	-	-	-
A-2	52,843,000.00	-	3.053000%	30/360	-	-	-	-	-	-	-
A-3	245,000,000.00	219,328,213.49	3.197000%	30/360	584,326.92	-	-	584,326.92	-	-	219,328,213.49
A-4	268,110,000.00	268,110,000.00	3.458000%	30/360	772,603.65	-	-	772,603.65	-	-	268,110,000.00
A-AB	38,890,000.00	6,108,072.30	3.243000%	30/360	16,507.07	-	572,145.09	588,652.16	-	-	5,535,927.21
A-S	89,450,000.00	89,450,000.00	3.711000%	30/360	276,624.12	-	-	276,624.12	-	-	89,450,000.00
B	38,016,000.00	38,016,000.00	3.963000%	30/360	125,547.84	-	-	125,547.84	-	-	38,016,000.00
C	36,899,000.00	36,899,000.00	4.232506%	30/360	130,146.04	-	-	130,146.04	-	-	36,899,000.00
D	41,370,000.00	41,370,000.00	3.000000%	30/360	103,425.00	-	-	103,425.00	-	-	41,370,000.00
E	21,245,000.00	21,245,000.00	3.300000%	30/360	58,423.75	-	-	58,423.75	-	-	21,245,000.00
F	8,945,000.00	8,945,000.00	3.300000%	30/360	24,598.75	-	-	24,598.75	-	-	8,945,000.00
G	8,945,000.00	8,945,000.00	3.300000%	30/360	24,598.75	-	-	24,598.75	-	-	8,945,000.00
H	23,481,024.00	20,987,913.95	3.300000%	30/360	16,185.68	-	-	16,185.68	296.40	-	20,987,617.55
R	-	-	0.000000%	30/360	-	-	-	-	-	-	-
VRR	47,079,054.00	39,968,642.14	0.000000%	30/360	138,787.09	-	30,112.90	168,899.99	15.60	-	39,938,513.64
Total	941,581,078.00	799,372,841.88			2,271,774.66	-	602,257.99	2,874,032.65	312.00	-	798,770,271.89
Notional
X-A	715,601,000.00	582,996,285.79	0.836131%	30/360	406,217.71	-	-	406,217.71	-	(572,145.09)	582,424,140.70
X-B	38,016,000.00	38,016,000.00	0.269506%	30/360	8,537.95	-	-	8,537.95	-	-	38,016,000.00
X-D	41,370,000.00	41,370,000.00	1.232506%	30/360	42,490.65	-	-	42,490.65	-	-	41,370,000.00
X-E	21,245,000.00	21,245,000.00	0.932506%	30/360	16,509.24	-	-	16,509.24	-	-	21,245,000.00
X-F	17,890,000.00	17,890,000.00	0.932506%	30/360	13,902.12	-	-	13,902.12	-	-	17,890,000.00
X-H	23,481,024.00	20,987,913.95	0.932506%	30/360	16,309.47	-	-	16,309.47	-	(296.40)	20,987,617.55
Total	857,603,024.00	722,505,199.74			503,967.14	-	-	503,967.14	-	(572,441.49)	721,932,758.25

Grand Total	1,799,184,102	1,521,878,042			2,775,741.80	-	602,257.99	3,377,999.79	312.00	(572,441.49)	1,520,703,030


Reports Available at sf.citidirect.com	v. 21.09.28	Page 2 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

DISTRIBUTION SUMMARY - FACTORS

September 17, 2026


								Accretion
								&
								Non-Cash
				Other				Balance
		Record	Interest	(As Interest)	Principal	Total	Realized Loss	Increase/	Current
Class	CUSIP	Date	Distributed	Distributed	Distributed	Distributed	/(Recovery)	(Decrease)	Balance

A-1	17326CAW4	08/31/2026	-	-	-	-	-	-	-
A-2	17326CAX2	08/31/2026	-	-	-	-	-	-	-
A-3	17326CAY0	08/31/2026	2.38500784	-	-	2.38500784	-	-	895.21719792
A-4	17326CAZ7	08/31/2026	2.88166667	-	-	2.88166667	-	-	1,000.00000000
A-AB	17326CBA1	08/31/2026	0.42445539	-	14.71188197	15.13633736	-	-	142.34834688
A-S	17326CBB9	08/31/2026	3.09249994	-	-	3.09249994	-	-	1,000.00000000
X-A	17326CBE3	08/31/2026	0.56765951	-	-	0.56765951	-	-	813.89509056
X-B	17326CBF0	08/31/2026	0.22458833	-	-	0.22458833	-	-	1,000.00000000
X-D	17326CAJ3 U1740GAE4 17326CAK0	08/31/2026	1.02708847	-	-	1.02708847	-	-	1,000.00000000
X-E	17326CAL8 U1740GAF1 17326CAM6	08/31/2026	0.77708826	-	-	0.77708826	-	-	1,000.00000000
X-F	17326CAN4 U1740GAG9 17326CAP9	08/31/2026	0.77708888	-	-	0.77708888	-	-	1,000.00000000
X-H	17326CBK9 U1740GAM6 17326CBL7	08/31/2026	0.69458087	-	-	0.69458087	-	-	893.81185207
B	17326CBC7	08/31/2026	3.30250000	-	-	3.30250000	-	-	1,000.00000000
C	17326CBD5	08/31/2026	3.52708854	-	-	3.52708854	-	-	1,000.00000000
D	17326CAA2 U1740GAA2 17326CAB0	08/31/2026	2.50000000	-	-	2.50000000	-	-	1,000.00000000
E	17326CAC8 U1740GAB0 17326CAD6	08/31/2026	2.75000000	-	-	2.75000000	-	-	1,000.00000000
F	17326CAE4 U1740GAC8 17326CAF1	08/31/2026	2.75000000	-	-	2.75000000	-	-	1,000.00000000
G	17326CAG9 U1740GAD6 17326CAH7	08/31/2026	2.75000000	-	-	2.75000000	-	-	1,000.00000000
H	17326CBG8 U1740GAL8 17326CBH6	08/31/2026	0.68930895	-	-	0.68930895	0.01262296	-	893.81185207
R	17326CAU8	08/31/2026	-	-	-	-	-	-	-
VRR	17326CAT1	08/31/2026	2.94795834	-	0.63962415	3.58758249	0.00033136	-	848.32872045


Reports Available at sf.citidirect.com	v. 21.09.28	Page 3 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

DISTRIBUTION INFORMATION - INTEREST DETAIL

September 17, 2026


		Rate			Interest			Shortfall				Paid
												Cap
				Accrual	Net	Accreted	Non	Carry	Cap Carryover			Carryover
Class	Uncapped Capped		Next	Dates	Accrued	/Deferred	Recovered	Forward	/Basis Risk	Accrued	Carry Forward /Basis Risk		Total

A-1	2.00800%	2.00800%	2.00800%	08/01-08/31	-	-	-	-	-	-	-	-	-
A-2	3.05300%	3.05300%	3.05300%	08/01-08/31	-	-	-	-	-	-	-	-	-
A-3	3.19700%	3.19700%	3.19700%	08/01-08/31	584,326.92	-	-	-	-	584,326.92	-	-	584,326.92
A-4	3.45800%	3.45800%	3.45800%	08/01-08/31	772,603.65	-	-	-	-	772,603.65	-	-	772,603.65
A-AB	3.24300%	3.24300%	3.24300%	08/01-08/31	16,507.07	-	-	-	-	16,507.07	-	-	16,507.07
A-S	3.71100%	3.71100%	3.71100%	08/01-08/31	276,624.12	-	-	-	-	276,624.12	-	-	276,624.12
B	3.96300%	3.96300%	3.96300%	08/01-08/31	125,547.84	-	-	-	-	125,547.84	-	-	125,547.84
C	4.31828%	4.23251%	4.23251%	08/01-08/31	130,146.04	-	-	-	-	130,146.04	-	-	130,146.04
D	3.00000%	3.00000%	3.00000%	08/01-08/31	103,425.00	-	-	-	-	103,425.00	-	-	103,425.00
E	3.30000%	3.30000%	3.30000%	08/01-08/31	58,423.75	-	-	-	-	58,423.75	-	-	58,423.75
F	3.30000%	3.30000%	3.30000%	08/01-08/31	24,598.75	-	-	-	-	24,598.75	-	-	24,598.75
G	3.30000%	3.30000%	3.30000%	08/01-08/31	24,598.75	-	-	-	-	24,598.75	-	-	24,598.75
H	3.30000%	3.30000%	3.30000%	08/01-08/31	57,716.76	-	-	48,972.28	-	16,185.68	-	-	16,185.68
R	0.00000%	0.00000%	0.00000%	08/01-08/31	-	-	-	-	-	-	-	-	-
VRR	0.00000%	0.00000%	0.00000%	08/01-08/31	138,787.09	-	-	-	-	138,787.09	-	-	138,787.09
Total					2,313,305.74	-	-	48,972.28	-	2,271,774.66	-	-	2,271,774.66
Notional
X-A	1.00278%	0.83613%	0.83613%	08/01-08/31	406,217.71	-	-	-	-	406,217.71	-	-	406,217.71
X-B	0.35528%	0.26951%	0.26951%	08/01-08/31	8,537.95	-	-	-	-	8,537.95	-	-	8,537.95
X-D	1.31828%	1.23251%	1.23251%	08/01-08/31	42,490.65	-	-	-	-	42,490.65	-	-	42,490.65
X-E	1.01828%	0.93251%	0.93251%	08/01-08/31	16,509.24	-	-	-	-	16,509.24	-	-	16,509.24
X-F	1.01828%	0.93251%	0.93251%	08/01-08/31	13,902.12	-	-	-	-	13,902.12	-	-	13,902.12
X-H	1.01828%	0.93251%	0.93251%	08/01-08/31	16,309.47	-	-	-	-	16,309.47	-	-	16,309.47
Total					503,967.14	-	-	-	-	503,967.14	-	-	503,967.14

Grand Total					2,817,272.88	-	-	48,972.28	-	2,775,741.80	-	-	2,775,741.80


Reports Available at sf.citidirect.com	v. 21.09.28	Page 4 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

DISTRIBUTION INFORMATION - INTEREST SHORTFALL DETAIL

September 17, 2026


											Cap Carryover /
	Non-Recov Shortfall				Carry Forward Interest					Basis Risk Shortfall
			Other
Class	PPIS	SSRA	Shortfall	Prior	Int. on Prior	New	Paid	Outstanding	Prior	Int. on Prior	New	Paid	Outstanding

A-1	-	-	-	-	-	-	-	-	-	-	-	-	-
A-2	-	-	-	-	-	-	-	-	-	-	-	-	-
A-3	-	-	-	-	-	-	-	-	-	-	-	-	-
A-4	-	-	-	-	-	-	-	-	-	-	-	-	-
A-AB	-	-	-	-	-	-	-	-	-	-	-	-	-
A-S	-	-	-	-	-	-	-	-	-	-	-	-	-
B	-	-	-	-	-	-	-	-	-	-	-	-	-
C	-	-	-	-	-	-	-	-	-	-	-	-	-
D	-	-	-	-	-	-	-	-	-	-	-	-	-
E	-	-	-	-	-	-	-	-	-	-	-	-	-
F	-	-	-	-	-	-	-	-	-	-	-	-	-
G	-	-	-	-	-	-	-	-	-	-	-	-	-
H	-	-	-	2,705,892.33	7,441.20	41,531.08	-	2,754,864.61	-	-	-	-	-
R	-	-	-	-	-	-	-	-	-	-	-	-	-
VRR	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	2,705,892.33	7,441.20	41,531.08	-	2,754,864.61	-	-	-	-	-
Notional
X-A	-	-	-	-	-	-	-	-	-	-	-	-	-
X-B	-	-	-	-	-	-	-	-	-	-	-	-	-
X-D	-	-	-	-	-	-	-	-	-	-	-	-	-
X-E	-	-	-	-	-	-	-	-	-	-	-	-	-
X-F	-	-	-	-	-	-	-	-	-	-	-	-	-
X-H	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	-	-	-	-	-	-	-	-	-	-	-	-	-

Grand Total	-	-	-	2,705,892.33	7,441.20	41,531.08	-	2,754,864.61	-	-	-	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 5 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

DISTRIBUTION INFORMATION - PRINCIPAL DETAIL

September 17, 2026


					Accretion
					&
					Non-Cash
					Balance		Cumulative
	Prior	Principal	Accreted	Realized Loss	Increase/	Current	Realized	Class %	Class %	Sub %	Sub %
Class	Balance	Distributed	Principal	/(Recovery)	(Decrease)	Balance	Loss	Original	Current	Original	Current

A-1	-	-	-	-	-	-	-	2.26%	0.00%	30.00%	35.04%
A-2	-	-	-	-	-	-	-	5.61%	0.00%	30.00%	35.04%
A-3	219,328,213.49	-	-	-	-	219,328,213.49	-	26.02%	27.46%	30.00%	35.04%
A-4	268,110,000.00	-	-	-	-	268,110,000.00	-	28.47%	33.57%	30.00%	35.04%
A-AB	6,108,072.30	572,145.09	-	-	-	5,535,927.21	-	4.13%	0.69%	30.00%	35.04%
A-S	89,450,000.00	-	-	-	-	89,450,000.00	-	9.50%	11.20%	20.00%	23.25%
B	38,016,000.00	-	-	-	-	38,016,000.00	-	4.04%	4.76%	15.75%	18.24%
C	36,899,000.00	-	-	-	-	36,899,000.00	-	3.92%	4.62%	11.63%	13.37%
D	41,370,000.00	-	-	-	-	41,370,000.00	-	4.39%	5.18%	7.00%	7.92%
E	21,245,000.00	-	-	-	-	21,245,000.00	-	2.26%	2.66%	4.63%	5.12%
F	8,945,000.00	-	-	-	-	8,945,000.00	-	0.95%	1.12%	3.63%	3.94%
G	8,945,000.00	-	-	-	-	8,945,000.00	-	0.95%	1.12%	2.62%	2.77%
H	20,987,913.95	-	-	296.40	-	20,987,617.55	2,493,406.45	2.49%	2.63%	0.00%	0.00%
R	-	-	-	-	-	-	-	0.00%	0.00%	0.00%	0.00%
VRR	39,968,642.14	30,112.90	-	15.60	-	39,938,513.64	131,231.91	5.00%	5.00%	0.00%	0.00%

Total	799,372,841.88	602,257.99	-	312.00	-	798,770,271.89	2,624,638.36	99.99%	100.01%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 6 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

RECONCILIATION DETAIL

September 17, 2026


SOURCE OF FUNDS			ALLOCATION OF FUNDS

Interest Funds Available			Scheduled Fees
Scheduled Interest	2,792,481.57		Servicing Fee	4,274.58
Prepayment Interest Shortfall	-		Trustee/Certificate Administrator Fee	4,543.10
Interest Adjustments	-		Operating Advisor Fee	743.43
ASER Amount	-		Asset Representations Reviewer Ongoing Fee	159.97
Realized Loss in Excess of Principal Balance	-		CREFC Intellectual Property Royalty License Fee	344.16
Total Interest Funds Available		2,792,481.57	Total Scheduled Fees		10,065.24
Principal Funds Available			Additional Fees, Expenses, etc.
Scheduled Principal	602,569.99		Additional Servicing Fee	-
Curtailments	-		Special Servicing Fee	3,500.00
Unscheduled Principal Collections	-		Work-out Fee	2,976.94
Net Liquidation Proceeds	-		Liquidation Fee	-
Repurchased Principal	-		Trust Fund Expenses	-
Substitution Principal	-		Trust Advisor Expenses	-
Other Principal	-		Reimbursement of Nonrecoverable Advances To the Servicer	-
			Reimbursement of Interest on Advances to the Servicer	197.59
Total Principal Funds Available		602,569.99
			Borrower Reimbursable Trust Fund Expenses	-
Other Funds Available
			Other Expenses	-
Yield Maintenance Charges	-
Withdrawal of Withheld Amounts from the Interest Reserve			Total Additional Fees, Expenses, etc.		6,674.53
Account	-
			Distributions
Deposit of Withheld Amounts to the Interest Reserve Account	-
			Interest Distribution	2,775,741.80
Total Other Funds Available		-	Principal Distribution	602,257.99
			Yield Maintenance Charge Distribution	-
			Total Distributions		3,377,999.79




Total Funds Available		3,395,051.56
			Total Funds Allocated		3,394,739.56


Reports Available at sf.citidirect.com	v. 21.09.28	Page 7 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

OTHER INFORMATION

Interest Reserve Account Information

September 17, 2026


Beginning Interest Reserve Account Balance	0.00
Deposit of Withheld Amounts to the Interest Reserve Account	0.00
Withdrawal of Withheld Amounts from the Interest Reserve Account	0.00
Ending Interest Reserve Account Balance	0.00
Excess Liquidation Proceeds Reserve Account Information
Beginning Excess Liquidation Proceeds Reserve Account Balance	0.00
Deposit to the Excess Liquidation Proceeds Reserve Account	0.00
Withdrawal from the Excess Liquidation Proceeds Reserve Account	0.00
Ending Excess Liquidation Proceeds Reserve Account Balance	0.00
ARD Mortgage Loan Information
Excess Interest	0.00
Collateral Information
% of Cut-Off Principal Balance Outstanding	84.832872%
Controlling Class Information
The Controlling Class is Class H.
The Controlling Class Representative is Investin Pro RED Holdings, LLC
There Are No Disclosable Special Servicer Fees.


Reports Available at sf.citidirect.com	v. 21.09.28	Page 8 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

September 17, 2026


Anticipated Remaining Term

Anticipated Remaining	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

60 Months or Less	46	798,770,271.92	100.00	4.1103	10	2.013585
61 to 90 Months	0	0.00	0.00	0.0000	0	0.000000
91 Months or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	46	798,770,271.92	100.00	4.1103	10	2.013585

Debt Service Coverage Ratio

Debt Service Coverage	Asset	Ending Scheduled	% of			Wtd Avg
Ratio Range	Count	Balance	Agg.Bal. WAC		WAM	DSCR

1.250 or Less	10	171,789,025.25	21.51	4.0336	10	0.424387
1.251 to 1.500	4	68,085,305.98	8.52	4.3477	9	1.306122
1.501 to 1.750	5	34,952,203.64	4.38	4.6545	10	1.654749
1.751 to 2.000	4	77,829,751.30	9.74	4.3067	8	1.832637
2.001 to 2.250	8	164,923,230.14	20.65	4.1632	10	2.097202
2.251 to 2.500	3	20,569,759.35	2.58	4.1816	10	2.378747
2.501 to 2.750	2	54,046,508.41	6.77	4.1254	10	2.549035
2.751 to 3.000	2	26,559,691.93	3.33	4.4163	11	2.928177
3.001 to 3.250	4	59,327,795.92	7.43	4.0048	10	3.120407
3.251 to 3.500	1	7,730,000.00	0.97	4.4050	11	3.308700
3.501 to 3.750	1	52,500,000.00	6.57	3.4180	11	3.513500
3.751 to 4.000	1	40,000,000.00	5.01	3.9400	10	3.830900
4.001 or Greater	1	20,457,000.00	2.56	3.6575	9	4.269700
Total	46	798,770,271.92	100.00	4.1103	10	2.013585


Reports Available at sf.citidirect.com	v. 21.09.28	Page 9 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

September 17, 2026


Ending Schedule Balance

Ending Schedule Balance	Asset	Ending Scheduled	% of			Wtd Avg
Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

1 to 5,000,000	6	21,646,635.08	2.71	4.6741	10	1.688833
10,000,001 to 15,000,000	4	51,856,971.46	6.49	4.1618	9	1.366896
15,000,001 to 20,000,000	2	30,700,000.00	3.84	3.3795	10	-0.660290
20,000,001 to 25,000,000	9	199,960,233.36	25.03	4.0628	9	2.565443
25,000,001 to 30,000,000	2	59,046,508.41	7.39	4.5421	11	2.293716
30,000,001 to 35,000,000	0	0.00	0.00	0.0000	0	0.000000
35,000,001 to 40,000,000	2	77,500,000.00	9.70	3.6932	10	1.977239
40,000,001 to 45,000,000	1	41,700,000.00	5.22	4.3200	11	1.862300
45,000,001 to 50,000,000	2	95,188,372.39	11.92	4.3735	10	1.181713
5,000,001 to 10,000,000	15	109,671,551.22	13.73	4.5347	10	2.007711
50,000,001 to 55,000,000	1	52,500,000.00	6.57	3.4180	11	3.513500
55,000,001 to 60,000,000	1	59,000,000.00	7.39	3.7700	11	2.114800
60,000,001 to 65,000,000	0	0.00	0.00	0.0000	0	0.000000
65,000,001 to 70,000,000	0	0.00	0.00	0.0000	0	0.000000
70,000,001 to 75,000,000	0	0.00	0.00	0.0000	0	0.000000
75,000,001 to 80,000,000	0	0.00	0.00	0.0000	0	0.000000
80,000,001 to 85,000,000	0	0.00	0.00	0.0000	0	0.000000
85,000,000+	0	0.00	0.00	0.0000	0	0.000000
Total	46	798,770,271.92	100.00	4.1103	10	2.013585


Reports Available at sf.citidirect.com	v. 21.09.28	Page 10 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

September 17, 2026


Loan Rate

	Asset	Ending Scheduled	% of			Wtd Avg
Loan Rate Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

4.00 or Less	12	312,157,000.00	39.08	3.6095	10	2.199899
4.01 to 4.25	7	141,659,812.76	17.73	4.1442	8	1.894879
4.26 to 4.50	11	159,409,451.28	19.96	4.3757	10	2.253423
4.51 to 4.75	9	144,564,336.22	18.10	4.6456	10	1.670924
4.76 to 5.00	6	37,078,290.45	4.64	4.8644	9	1.269297
5.01 to 5.25	1	3,901,381.21	0.49	5.1100	10	1.387700
5.26 to 5.50	0	0.00	0.00	0.0000	0	0.000000
5.51 to 5.75	0	0.00	0.00	0.0000	0	0.000000
5.76 to 6.00	0	0.00	0.00	0.0000	0	0.000000
6.01 to 6.25	0	0.00	0.00	0.0000	0	0.000000
6.26 to 6.50	0	0.00	0.00	0.0000	0	0.000000
6.51 to 6.75	0	0.00	0.00	0.0000	0	0.000000
6.76 to 7.00	0	0.00	0.00	0.0000	0	0.000000
7.01 or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	46	798,770,271.92	100.00	4.1103	10	2.013585

Property Type

	Asset	Ending Scheduled	% of			Wtd Avg
Property Type Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Industrial	0	0.00	0.00	0.0000	0	0.000000
Lodging	4	103,629,243.43	12.97	4.6233	11	1.918756
Mixed Use	6	152,300,000.00	19.07	3.7591	10	2.939756
Multifamily	3	71,182,054.22	8.91	4.2859	10	1.986723
Office	8	115,000,533.42	14.40	4.2394	10	0.959262
Other	4	78,200,000.00	9.79	3.4958	10	0.317524
Retail	11	182,581,923.99	22.86	4.1363	9	2.179369
Self Storage	9	90,159,610.07	11.29	4.2400	10	3.046602
Total	46	798,770,271.92	100.00	4.1103	10	2.013585


Reports Available at sf.citidirect.com	v. 21.09.28	Page 11 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

September 17, 2026


Remaining Amortization Term

Remaining Amortization	Asset	Ending Scheduled	% of			Wtd Avg
Term Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

240 Months or Less	24	556,879,452.52	69.72	3.9336	10	2.103768
241 to 270 Months	22	241,890,819.40	30.28	4.5172	10	1.805967
271 to 300 Months	0	0.00	0.00	0.0000	0	0.000000
301 Months or Greater	0	0.00	0.00	0.0000	0	0.000000
Total	46	798,770,271.92	100.00	4.1103	10	2.013585

Seasoning

	Asset	Ending Scheduled	% of			Wtd Avg
Seasoning Range	Count	Balance	Agg.Bal.	WAC	WAM	DSCR

12 Months or Less	0	0.00	0.00	0.0000	0	0.000000
13 to 24 Months	0	0.00	0.00	0.0000	0	0.000000
25 to 36 Months	0	0.00	0.00	0.0000	0	0.000000
37 to 48 Months	0	0.00	0.00	0.0000	0	0.000000
49 Months or Greater	46	798,770,271.92	100.00	4.1103	10	2.013585
Total	46	798,770,271.92	100.00	4.1103	10	2.013585


Reports Available at sf.citidirect.com	v. 21.09.28	Page 12 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

STRATIFICATION DETAIL

September 17, 2026


State

	Asset	Ending Scheduled	% of			Wtd Avg
State Range	Count	Balance	Agg.Bal. WAC WAM			DSCR

Alabama	0	0.00	0.00	0.0000	0	0.000000
Arizona	0	0.00	0.00	0.0000	0	0.000000
California	3	73,764,022.89	9.23	4.3721	10	2.027712
Florida	4	31,605,000.00	3.96	4.2439	10	2.843702
Georgia	0	0.00	0.00	0.0000	0	0.000000
Illinois	3	15,782,032.45	1.98	4.8544	10	0.993091
Indiana	1	4,565,755.42	0.57	4.7900	10	1.223400
Kansas	1	12,765,156.01	1.60	4.8500	7	1.408000
Kentucky	0	0.00	0.00	0.0000	0	0.000000
Maryland	0	0.00	0.00	0.0000	0	0.000000
Michigan	1	20,909,791.43	2.62	4.5900	11	1.226400
N/A	3	67,700,000.00	8.48	3.4300	10	0.000000
Nevada	0	0.00	0.00	0.0000	0	0.000000
New Jersey	0	0.00	0.00	0.0000	0	0.000000
New York	11	228,543,615.47	28.61	3.9262	10	2.263309
North Carolina	0	0.00	0.00	0.0000	0	0.000000
Ohio	1	6,959,554.22	0.87	4.4890	10	2.359500
Pennsylvania	1	23,000,000.00	2.88	4.0510	10	3.024400
Texas	5	53,372,412.34	6.68	4.3776	10	1.841822
Various	0	0.00	0.00	0.0000	0	0.000000
Total	46	798,770,271.92	100.00	4.1103	10	2.013585


Reports Available at sf.citidirect.com	v. 21.09.28	Page 13 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

MORTGAGE LOAN DETAIL

September 17, 2026


		Prop			Paid				Beginning	Ending		Payment Workout Mod
		Type			Through	Gross	Interest	Principal	Scheduled	Scheduled	Maturity	Status	Strategy Code
Loan ID	OMCR	(1)	City	State	Date	Coupon	Payment	Payment	Balance	Balance	Date	(2)	(3)	(4)

304101882	1	MU	New York	NY	09/09/2026	3.43000%	73,840.28	-	25,000,000.00	25,000,000.00	06/09/2027	0	0	0
304101843	10	RT	New York	NY	09/06/2026	4.36600%	112,788.33	-	30,000,000.00	30,000,000.00	08/06/2027	0	0	0
1749262	11	OF	Troy	MI	09/01/2026	4.59000%	82,827.07	45,824.72	20,955,616.15	20,909,791.43	08/01/2027	0	0	0
1647690	12	RT	Various	XX	09/01/2026	4.19000%	88,528.15	-	24,536,250.00	24,536,250.00	11/01/2026	0	0	0
1749833	13	LO	Lafayette	LA	09/01/2026	4.42000%	76,425.71	45,044.50	20,079,736.43	20,034,691.93	08/01/2027	0	0	8
300801642	14	MU	Lahaska	PA	09/01/2026	4.05100%	80,232.31	-	23,000,000.00	23,000,000.00	07/01/2027	0	0	0
1749778	15	MF	Dallas	TX	09/01/2026	4.16000%	80,680.60	-	22,522,500.00	22,522,500.00	07/01/2027	0	0	0
304101831	16	MU	Corona	NY	09/06/2026	4.36000%	82,597.78	-	22,000,000.00	22,000,000.00	07/06/2027	0	0	0
300801633	17	MU	New Rochelle	NY	09/01/2026	3.80000%	70,352.78	-	21,500,000.00	21,500,000.00	07/01/2027	0	0	0
308511018	18	RT	Torrance	CA	09/01/2026	3.65750%	64,429.61	-	20,457,000.00	20,457,000.00	06/01/2027	0	0	0
304101851	19	OF	New York	NY	09/06/2026	3.33000%	44,446.25	-	15,500,000.00	15,500,000.00	08/06/2027	0	0	0
304101891	1A	N/A			09/09/2026	3.43000%	44,304.17	-	15,000,000.00	15,000,000.00	06/09/2027	0	0	0
453011619	1B	N/A			09/09/2026	3.43000%	44,894.89	-	15,200,000.00	15,200,000.00	06/09/2027	0	0	0
453011576	1C	N/A			09/09/2026	3.43000%	110,760.42	-	37,500,000.00	37,500,000.00	06/09/2027	0	0	0
1749343	2	RT	Metairie	LA	09/01/2026	3.77000%	191,536.94	-	59,000,000.00	59,000,000.00	08/01/2027	0	0	0
300801632	20	OF	Wichita	KS	09/01/2026	4.85000%	53,425.22	27,047.78	12,792,203.79	12,765,156.01	04/01/2027	0	0	0
304101858	21	SS	Various	XX	09/06/2026	4.51000%	52,879.41	24,227.10	13,616,042.55	13,591,815.45	08/06/2027	0	0	0
1749084	22	RT	Plano	TX	09/01/2026	4.64000%	29,269.75	42,835.52	7,325,576.22	7,282,740.70	08/01/2027	0	0	0
1648607	24	LO	El Paso	TX	09/01/2026	4.71500%	37,390.22	19,759.16	9,209,099.73	9,189,340.57	08/01/2027	0	8	8
1749362	25	OF	Houston	TX	09/01/2026	4.25000%	32,956.41	20,837.22	9,005,166.99	8,984,329.77	07/01/2027	0	0	0
304101839	26	N/A	Maitland	FL	09/06/2026	3.92000%	35,443.33	-	10,500,000.00	10,500,000.00	07/06/2027	0	0	0
1749761	3	OF	Milwaukee	WI	09/01/2026	4.14000%	177,981.89	95,124.02	49,924,793.89	49,829,669.87	07/01/2027	0	0	0
304101859	30	RT	Chicago	IL	01/06/2020	4.91000%	-	-	8,770,446.11	8,770,446.11	08/06/2027	3	2	0
304101862	31	RT	Ka'anapali	HI	09/06/2026	4.08000%	28,082.41	15,301.09	7,993,097.01	7,977,795.92	08/06/2027	0	0	0
308511032	32	RT	Hercules	CA	09/06/2026	4.74000%	32,490.55	11,798.25	7,960,118.62	7,948,320.37	08/06/2027	0	0	0
1749956	33	MU	Brooklyn	NY	09/01/2026	4.40000%	31,447.78	-	8,300,000.00	8,300,000.00	04/01/2027	0	0	0
300801641	34	MF	Marysville	OH	09/01/2026	4.48900%	26,950.75	12,519.74	6,972,073.96	6,959,554.22	07/01/2027	0	0	0
300801651	35	SS	Miami Gardens	FL	09/01/2026	4.40500%	29,321.39	-	7,730,000.00	7,730,000.00	08/01/2027	0	0	0
300801648	36	SS	Hialeah	FL	09/01/2026	4.40500%	25,983.38	-	6,850,000.00	6,850,000.00	08/01/2027	0	0	0
300801649	37	SS	Hialeah	FL	09/01/2026	4.40500%	24,750.59	-	6,525,000.00	6,525,000.00	08/01/2027	0	0	0
1749521	38	RT	Saugerties	NY	09/01/2026	4.73000%	23,836.77	8,690.89	5,852,306.36	5,843,615.47	08/01/2027	0	0	0
304101856	39	RT	Brooklyn	NY	09/06/2026	4.45000%	23,758.06	-	6,200,000.00	6,200,000.00	08/06/2027	0	0	0


Reports Available at sf.citidirect.com	v. 21.09.28	Page 14 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

MORTGAGE LOAN DETAIL

September 17, 2026


		Prop			Paid				Beginning	Ending		Payment Workout Mod
		Type			Through	Gross	Interest	Principal	Scheduled	Scheduled	Maturity	Status Strategy Code
Loan ID	OMCR	(1)	City	State	Date	Coupon	Payment	Payment	Balance	Balance	Date	(2)	(3)	(4)

304101861	4	LO	San Diego	CA	09/06/2026	4.63000%	181,306.66	116,386.95	45,475,089.47	45,358,702.52	08/06/2027	0	8	8
300801659	40	MH	Brookings	OR	09/01/2026	4.92000%	24,255.34	8,193.18	5,725,099.97	5,716,906.79	08/01/2027	0	0	0
304101838	41	SS	Balch Springs	TX	09/06/2026	4.57000%	21,262.58	9,567.40	5,403,068.70	5,393,501.30	07/06/2027	0	0	0
300801640	42	SS	Castle Rock	CO	09/01/2026	4.23500%	17,573.76	9,680.19	4,818,947.39	4,809,267.20	07/01/2027	0	0	0
1749567	43	RT	Goshen	IN	09/01/2026	4.79000%	18,867.06	8,384.12	4,574,139.54	4,565,755.42	07/01/2027	0	0	0
1749823	45	OF	Barrington	IL	09/01/2026	5.11000%	17,202.09	7,937.76	3,909,318.97	3,901,381.21	07/01/2027	0	0	0
300801653	46	SS	Shreveport	LA	09/01/2026	4.77300%	15,115.44	6,721.25	3,677,648.48	3,670,927.23	08/01/2027	0	0	0
300801652	47	OF	Skokie	IL	09/01/2026	4.37700%	11,745.55	6,083.15	3,116,288.28	3,110,205.13	08/01/2027	0	0	0
300801650	48	SS	Baton Rouge	LA	09/01/2026	4.95300%	6,789.67	2,821.48	1,591,920.37	1,589,098.89	08/01/2027	0	0	0
300801657	5	MU	Bronx	NY	09/01/2026	3.41800%	154,522.08	-	52,500,000.00	52,500,000.00	08/01/2027	0	0	0
304101849	7	MF	New York	NY	09/06/2026	4.32000%	155,124.00	-	41,700,000.00	41,700,000.00	08/06/2027	0	0	0
308511008	8	SS	Various	XX	09/06/2026	3.94000%	135,711.11	-	40,000,000.00	40,000,000.00	07/06/2027	0	0	0
300801656	9	LO	Various	XX	09/01/2026	4.72400%	118,393.03	57,784.52	29,104,292.93	29,046,508.41	08/01/2027	0	0	0
Total	Count = 45						2,792,481.57	602,569.99	799,372,841.91	798,770,271.92


Reports Available at sf.citidirect.com	v. 21.09.28	Page 15 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

NOI DETAIL

September 17, 2026


		Property			Ending	Preceding	Most	Most Recent	Most Recent
		Type			Scheduled	Fiscal	Recent	Financial As of	Financial Asof
Loan ID	OMCR	(1)	City	State	Balance	Year NOI	NOI	Start Date	End Date

304101882	1	MU	New York	NY	25,000,000.00	196,065,501.36	102,865,359.97	01/01/2026	06/30/2026
304101843	10	RT	New York	NY	30,000,000.00	2,522,805.10	1,355,816.62	01/01/2026	06/30/2026
1749262	11	OF	Troy	MI	20,909,791.43	2,467,255.82	1,220,669.21	01/01/2026	06/30/2026
1647690	12	RT	Various	XX	24,536,250.00	2,217,032.35	1,122,150.18	01/01/2026	06/30/2026
1749833	13	LO	Lafayette	LA	20,034,691.93	4,791,500.40	4,878,058.85	07/01/2025	06/30/2026
300801642	14	MU	Lahaska	PA	23,000,000.00	2,713,934.85	1,512,500.63	Not Available	Not Available
1749778	15	MF	Dallas	TX	22,522,500.00	2,477,603.63	1,039,633.99	01/01/2026	06/30/2026
304101831	16	MU	Corona	NY	22,000,000.00	2,144,289.13	1,104,336.49	01/01/2026	06/30/2026
300801633	17	MU	New Rochelle	NY	21,500,000.00	3,471,391.28	1,506,602.97	01/01/2026	06/30/2026
308511018	18	RT	Torrance	CA	20,457,000.00	60,987,298.00	44,992,864.00	Not Available	Not Available
304101851	19	OF	New York	NY	15,500,000.00	646,698.51	(119,489.48)	Not Available	Not Available
304101891	1A	N/A			15,000,000.00	-	-	Not Available	Not Available
453011619	1B	N/A			15,200,000.00	-	-	Not Available	Not Available
453011576	1C	N/A			37,500,000.00	-	-	Not Available	Not Available
1749343	2	RT	Metairie	LA	59,000,000.00	17,420,567.00	7,790,289.00	01/01/2026	06/30/2026
300801632	20	OF	Wichita	KS	12,765,156.01	1,230,397.39	1,088,531.98	Not Available	Not Available
304101858	21	SS	Various	XX	13,591,815.45	2,086,269.09	965,847.10	01/01/2026	06/30/2026
1749084	22	RT	Plano	TX	7,282,740.70	1,272,584.00	966,211.00	Not Available	Not Available
1648607	24	LO	El Paso	TX	9,189,340.57	1,562,725.43	1,467,653.79	07/01/2025	06/30/2026
1749362	25	OF	Houston	TX	8,984,329.77	948,588.95	773,888.91	Not Available	Not Available
304101839	26	N/A	Maitland	FL	10,500,000.00	974,545.00	492,097.00	01/01/2026	06/30/2026
1749761	3	OF	Milwaukee	WI	49,829,669.87	8,419,149.61	4,513,195.02	01/01/2026	06/30/2026
304101859	30	RT	Chicago	IL	8,770,446.11	146,501.00	182,950.00	Not Available	Not Available
304101862	31	RT	Ka'anapali	HI	7,977,795.92	1,079,315.57	866,006.35	01/01/2025	06/30/2025
308511032	32	RT	Hercules	CA	7,948,320.37	917,378.00	691,702.33	Not Available	Not Available
1749956	33	MU	Brooklyn	NY	8,300,000.00	571,362.05	446,253.29	Not Available	Not Available
300801641	34	MF	Marysville	OH	6,959,554.22	1,145,624.06	575,367.06	01/01/2026	06/30/2026
300801651	35	SS	Miami Gardens	FL	7,730,000.00	1,196,014.70	576,690.09	01/01/2026	06/30/2026
300801648	36	SS	Hialeah	FL	6,850,000.00	1,014,791.11	471,949.59	01/01/2026	06/30/2026
300801649	37	SS	Hialeah	FL	6,525,000.00	863,144.35	416,135.44	01/01/2026	06/30/2026
1749521	38	RT	Saugerties	NY	5,843,615.47	720,818.42	531,853.00	Not Available	Not Available
304101856	39	RT	Brooklyn	NY	6,200,000.00	505,146.03	257,847.50	01/01/2026	06/30/2026
Reports Available at sf.citidirect.com		v. 21.09.28			Page 16 of 44			© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

NOI DETAIL

September 17, 2026


		Property			Ending	Preceding	Most	Most Recent	Most Recent
		Type			Scheduled	Fiscal	Recent	Financial As of	Financial Asof
Loan ID	OMCR	(1)	City	State	Balance	Year NOI	NOI	Start Date	End Date

304101861	4	LO	San Diego	CA	45,358,702.52	4,667,003.15	4,557,389.58	07/01/2025	06/30/2026
300801659	40	MH	Brookings	OR	5,716,906.79	792,245.45	654,255.59	Not Available	Not Available
304101838	41	SS	Balch Springs	TX	5,393,501.30	688,898.78	542,533.41	Not Available	Not Available
300801640	42	SS	Castle Rock	CO	4,809,267.20	697,896.91	332,335.03	01/01/2024	06/30/2024
1749567	43	RT	Goshen	IN	4,565,755.42	437,560.00	216,814.38	01/01/2026	06/30/2026
1749823	45	OF	Barrington	IL	3,901,381.21	459,232.01	234,695.23	01/01/2026	06/30/2026
300801653	46	SS	Shreveport	LA	3,670,927.23	466,900.54	226,954.97	Not Available	Not Available
300801652	47	OF	Skokie	IL	3,110,205.13	611,975.54	147,692.74	Not Available	Not Available
300801650	48	SS	Baton Rouge	LA	1,589,098.89	151,113.47	78,499.57	Not Available	Not Available
300801657	5	MU	Bronx	NY	52,500,000.00	9,159,142.18	3,401,902.97	01/01/2026	06/30/2026
304101849	7	MF	New York	NY	41,700,000.00	3,279,413.28	843,580.81	01/01/2026	03/31/2026
308511008	8	SS	Various	XX	40,000,000.00	11,952,614.75	5,950,773.14	01/01/2026	06/30/2026
300801656	9	LO	Various	XX	29,046,508.41	5,798,427.96	6,097,814.52	07/01/2025	06/30/2026
Total	Count = 45				798,770,271.92	361,742,656.21	207,838,213.82


Reports Available at sf.citidirect.com	v. 21.09.28	Page 17 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

COLLATERAL PERFORMANCE - DELINQUENCY AND LOAN STATUS DETAIL

September 17, 2026


				Delinquent
			(Does not include loans in Bankruptcy, Foreclosure, or REO)

		30 Day		60 Day		90 Day	120+ Day		Bankruptcy		Foreclosure			REO

Distribution

Date	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count	Balance	Count		Balance


	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
09/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
08/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
07/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
06/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
05/15/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.2%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
04/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
03/17/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
02/18/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
01/16/2026
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
12/17/2025
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
11/18/2025
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%

	0	0	0	0	0	0	1	8,770,446	0	0	0	0	0		0
10/20/2025
	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%	2.1%	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%		0.0%


Reports Available at sf.citidirect.com	v. 21.09.28	Page 19 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

September 17, 2026


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

9/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
8/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
7/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
6/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
5/15/2026	1647637	27	Clinton Crossings Medical Office	4,773,206.40	-	-	09/11/2025	-	-
5/15/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
4/17/2026	1647637	27	Clinton Crossings Medical Office	5,432,179.86	4,773,206.40	-	09/11/2025	-	-
4/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,876,491.98	04/13/2026	-	571,999.49
3/17/2026	1647637	27	Clinton Crossings Medical Office	5,470,484.83	5,432,179.86	-	09/11/2025	-	-
3/17/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
2/18/2026	1647637	27	Clinton Crossings Medical Office	5,506,705.17	5,470,484.83	-	09/11/2025	-	-
2/18/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
1/16/2026	1647637	27	Clinton Crossings Medical Office	5,542,792.51	5,506,705.17	-	09/11/2025	-	-
1/16/2026	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
12/17/2025	1647637	27	Clinton Crossings Medical Office	5,579,408.23	5,542,792.51	-	09/11/2025	-	-
12/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
11/18/2025	1647637	27	Clinton Crossings Medical Office	5,615,228.60	5,579,408.23	-	09/11/2025	-	-
11/18/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
10/20/2025	1647637	27	Clinton Crossings Medical Office	5,651,586.88	5,615,228.60	-	11/12/2024	-	-
10/20/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
9/17/2025	1647637	27	Clinton Crossings Medical Office	5,687,142.21	5,651,586.88	-	11/12/2024	-	-
9/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
8/15/2025	1647637	27	Clinton Crossings Medical Office	5,722,566.98	5,687,142.21	-	11/12/2024	-	-
8/15/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
7/17/2025	1647637	27	Clinton Crossings Medical Office	5,758,543.78	5,722,566.98	-	11/12/2024	-	-
7/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
6/17/2025	1647637	27	Clinton Crossings Medical Office	8,316,178.80	5,758,543.78	-	11/12/2024	-	-
6/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
5/16/2025	1647637	27	Clinton Crossings Medical Office	8,342,937.93	8,316,178.80	-	11/12/2024	-	-
5/16/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
4/17/2025	1647637	27	Clinton Crossings Medical Office	8,368,610.56	8,342,937.93	-	11/12/2024	-	-
4/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
3/17/2025	1647637	27	Clinton Crossings Medical Office	8,397,172.91	8,368,610.56	-	11/12/2024	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 21 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

September 17, 2026


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

3/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
2/18/2025	1647637	27	Clinton Crossings Medical Office	8,422,646.39	8,397,172.91	-	11/12/2024	-	-
2/18/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	7,228,068.59	02/11/2025	-	571,999.49
1/17/2025	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
12/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
11/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
10/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
9/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
8/16/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
7/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
6/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
5/17/2024	1647637	27	Clinton Crossings Medical Office	8,651,745.34	8,626,087.62	-	12/11/2023	-	-
5/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
4/17/2024	1647637	27	Clinton Crossings Medical Office	8,676,284.02	8,651,745.34	-	12/11/2023	-	-
4/17/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
3/15/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
2/16/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	6,077,655.10	02/12/2024	-	571,999.49
1/18/2024	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
12/15/2023	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
11/17/2023	304101859	30	4901 West Irving Park	8,770,446.11	8,770,446.11	4,876,065.98	02/13/2023	-	571,999.49
10/17/2023	304101859	30	4901 West Irving Park	8,786,300.63	8,770,446.11	4,876,065.98	02/13/2023	19,930.92	571,999.49
9/15/2023	304101859	30	4901 West Irving Park	8,800,895.09	8,786,300.63	4,876,065.98	02/13/2023	20,595.28	552,068.57
8/17/2023	304101859	30	4901 West Irving Park	8,815,428.10	8,800,895.09	4,876,065.98	02/13/2023	20,595.28	531,473.29
7/17/2023	304101859	30	4901 West Irving Park	8,831,099.32	8,815,428.10	4,876,065.98	02/13/2023	19,930.92	510,878.01
6/16/2023	304101859	30	4901 West Irving Park	8,845,505.16	8,831,099.32	4,876,065.98	02/13/2023	20,595.29	490,947.09
5/17/2023	304101859	30	4901 West Irving Park	8,861,053.81	8,845,505.16	4,876,065.98	02/13/2023	19,930.92	470,351.80
4/17/2023	1647637	27	Clinton Crossings Medical Office	8,969,923.99	8,946,467.53	-	12/12/2022	-	-
4/17/2023	304101859	30	4901 West Irving Park	8,875,333.54	8,861,053.81	4,876,065.98	02/13/2023	20,595.28	450,420.88
3/17/2023	304101859	30	4901 West Irving Park	8,893,176.62	8,875,333.54	4,876,065.98	02/13/2023	18,602.19	429,825.60
2/17/2023	304101859	30	4901 West Irving Park	8,907,321.10	8,893,176.62	4,876,065.98	02/13/2023	20,595.29	411,223.41
1/18/2023	304101859	30	4901 West Irving Park	8,921,406.03	8,907,321.10	3,964,600.49	02/11/2022	16,745.48	390,628.12
12/16/2022	304101859	30	4901 West Irving Park	8,936,645.39	8,921,406.03	3,964,600.49	02/11/2022	16,205.30	373,882.64
11/18/2022	304101859	30	4901 West Irving Park	8,950,606.86	8,936,645.39	3,964,600.49	02/11/2022	16,745.48	357,677.34


Reports Available at sf.citidirect.com	v. 21.09.28	Page 22 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

September 17, 2026


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

10/17/2022	304101859	30	4901 West Irving Park	8,965,727.22	8,950,606.86	3,964,600.49	02/11/2022	16,205.30	340,931.86
9/16/2022	304101859	30	4901 West Irving Park	8,979,566.25	8,965,727.22	3,964,600.49	02/11/2022	16,745.48	324,726.56
8/17/2022	304101859	30	4901 West Irving Park	8,993,347.01	8,979,566.25	3,964,600.49	02/11/2022	16,745.48	307,981.08
7/15/2022	304101859	30	4901 West Irving Park	9,008,293.21	8,993,347.01	3,964,600.49	02/11/2022	16,205.31	291,235.60
6/17/2022	304101859	30	4901 West Irving Park	9,021,953.02	9,008,293.21	3,964,600.49	02/11/2022	16,745.48	275,030.29
5/17/2022	304101859	30	4901 West Irving Park	9,036,782.65	9,021,953.02	3,964,600.49	02/11/2022	16,205.30	258,284.81
4/15/2022	304101859	30	4901 West Irving Park	9,050,322.51	9,036,782.65	3,964,600.49	02/11/2022	16,745.48	242,079.51
3/17/2022	304101859	30	4901 West Irving Park	9,067,499.87	9,050,322.51	3,964,600.49	02/11/2022	15,124.95	225,334.03
2/17/2022	304101859	30	4901 West Irving Park	9,080,910.41	9,067,499.87	3,964,600.49	02/11/2022	16,745.48	210,209.08
1/18/2022	304101859	30	4901 West Irving Park	9,094,264.48	9,080,910.41	2,716,535.50	03/11/2021	11,473.97	193,463.60
12/17/2021	304101859	30	4901 West Irving Park	9,108,799.44	9,094,264.48	2,716,535.50	03/11/2021	11,103.84	181,989.63
11/18/2021	304101859	30	4901 West Irving Park	9,122,036.09	9,108,799.44	2,716,535.50	03/11/2021	11,473.97	170,885.79
10/18/2021	304101859	30	4901 West Irving Park	9,136,457.88	9,122,036.09	2,716,535.50	03/11/2021	11,103.84	159,411.82
9/17/2021	304101859	30	4901 West Irving Park	9,149,578.09	9,136,457.88	2,716,535.50	03/11/2021	11,473.97	148,307.98
8/17/2021	304101859	30	4901 West Irving Park	9,162,643.06	9,149,578.09	2,716,535.50	03/11/2021	11,473.97	136,834.01
7/16/2021	304101859	30	4901 West Irving Park	9,176,899.38	9,162,643.06	2,716,535.50	03/11/2021	11,103.84	125,360.04
6/17/2021	304101859	30	4901 West Irving Park	9,189,849.32	9,176,899.38	2,716,535.50	03/11/2021	11,473.97	114,256.20
5/17/2021	304101859	30	4901 West Irving Park	9,203,994.77	9,189,849.32	2,716,535.50	03/11/2021	11,103.84	102,782.23
5/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,238,198.79	52,142,057.56	-		(152,355.24)	-
4/16/2021	304101859	30	4901 West Irving Park	9,216,830.63	9,203,994.77	2,716,535.50	03/11/2021	11,473.97	91,678.39
4/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,327,266.50	52,238,198.79	13,176,669.56	12/11/2020	-	152,355.24
3/17/2021	1648607	24	Hotel Indigo El Paso	10,395,520.76	10,376,494.06	-		(10,601.99)	-
3/17/2021	304101859	30	4901 West Irving Park	9,233,374.53	9,216,830.63	2,716,535.50	03/11/2021	10,363.58	80,204.42
3/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,436,131.77	52,327,266.50	13,176,669.56	12/11/2020	47,399.41	152,355.24
2/18/2021	1648607	24	Hotel Indigo El Paso	10,410,402.46	10,395,520.76	-	12/11/2020	-	10,601.99
2/18/2021	304101859	30	4901 West Irving Park	9,246,086.69	9,233,374.53	1,675,140.96	04/13/2020	7,075.38	69,840.84
2/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,524,413.46	52,436,131.77	13,176,669.56	12/11/2020	52,477.92	104,955.83
1/15/2021	1648607	24	Hotel Indigo El Paso	10,425,223.98	10,410,402.46	-	12/11/2020	-	10,601.99
1/15/2021	304101859	30	4901 West Irving Park	9,258,745.33	9,246,086.69	1,675,140.96	04/13/2020	7,075.38	62,765.46
1/15/2021	304101861	4	Old Town San Diego Hotel Portfolio	52,612,344.58	52,524,413.46	13,176,669.56	12/11/2020	52,477.91	52,477.91
12/17/2020	1648607	24	Hotel Indigo El Paso	10,441,347.57	10,425,223.98	-	12/11/2020	-	10,601.99
12/17/2020	304101859	30	4901 West Irving Park	9,272,610.03	9,258,745.33	1,675,140.96	04/13/2020	6,847.14	55,690.08
12/17/2020	304101861	4	Old Town San Diego Hotel Portfolio	52,706,678.26	52,612,344.58	13,176,669.56	12/11/2020	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 23 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL APPRAISAL REDUCTION DETAIL

September 17, 2026


Distribution				Beginning	Ending	Appraisal	Appraisal	Most Recent	Cumulative
Date	Loan ID	OMCR	Property Name	Scheduled Balance Scheduled Balance Reduction Amount Reduction Date				ASER Amount	ASER Amount

11/18/2020	1648607	24	Hotel Indigo El Paso	10,456,043.96	10,441,347.57	2,614,010.99	11/12/2020	10,601.99	10,601.99
11/18/2020	304101859	30	4901 West Irving Park	9,285,157.00	9,272,610.03	1,675,140.96	04/13/2020	7,075.38	48,842.94
10/19/2020	304101859	30	4901 West Irving Park	9,298,914.07	9,285,157.00	1,675,140.96	04/13/2020	6,847.14	41,767.56
9/17/2020	304101859	30	4901 West Irving Park	9,311,350.29	9,298,914.07	1,675,140.96	04/13/2020	7,075.38	34,920.42
8/17/2020	304101859	30	4901 West Irving Park	9,323,734.15	9,311,350.29	1,675,140.96	04/13/2020	7,075.38	27,845.04
7/17/2020	304101859	30	4901 West Irving Park	9,337,334.02	9,323,734.15	1,675,140.96	04/13/2020	6,847.14	20,769.66
6/17/2020	304101859	30	4901 West Irving Park	9,349,608.49	9,337,334.02	1,675,140.96	04/13/2020	7,075.38	13,922.52
5/15/2020	304101859	30	4901 West Irving Park	9,363,102.92	9,349,608.49	1,675,140.96	04/13/2020	6,847.14	6,847.14
4/17/2020	304101859	30	4901 West Irving Park	9,375,268.89	9,363,102.92	1,675,140.96	04/13/2020	-	-


Reports Available at sf.citidirect.com	v. 21.09.28	Page 24 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

09/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/15/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/15/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/15/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/18/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/18/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/18/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/16/2026	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/16/2026	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/16/2026	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 26 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

10/20/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/20/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/20/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/15/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/15/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/15/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/16/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/16/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/16/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/18/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/18/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/18/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/17/2025	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/17/2025	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/17/2025	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 27 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

11/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/16/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/16/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/16/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/15/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/15/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/15/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/16/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/16/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/16/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/18/2024	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2024	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2024	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 28 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

12/15/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/15/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/15/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/15/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/15/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/15/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/16/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/16/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/16/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
02/17/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/17/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/17/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 29 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

01/18/2023	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2023	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2023	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/16/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/16/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/16/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/16/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/16/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/16/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/15/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/15/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/15/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/15/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/15/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/15/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
03/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
03/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 30 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026


Distribution				Modification	Modification
Date	Loan ID	OMCR	Property Name	Date	Code (4)

02/17/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/17/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/17/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
01/18/2022	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/18/2022	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/18/2022	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
12/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
12/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
11/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
11/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
10/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
10/18/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
09/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
09/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
08/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
08/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
07/16/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
07/16/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
07/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
06/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
06/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
06/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
05/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
05/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
05/17/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8
04/16/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
04/16/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
04/16/2021	304101861	4	Old Town San Diego Hotel Portfolio	06/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 31 of 44	© Copyright 2026 Citigroup

Citigroup Commercial Mortgage Trust 2017-B1

Commercial Mortgage Pass-Through Certificates, Series 2017-B1

HISTORICAL LOAN MODIFICATION DETAIL

September 17, 2026

Modification

Code (4)


Distribution				Modification
Date	Loan ID	OMCR	Property Name	Date

03/17/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
03/17/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
02/18/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
02/18/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
01/15/2021	1749833	13	DoubleTree Lafayette	04/01/2020	8
01/15/2021	1648607	24	Hotel Indigo El Paso	07/01/2020	8
12/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
11/18/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
10/19/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
09/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8
08/17/2020	1749833	13	DoubleTree Lafayette	04/01/2020	8


Reports Available at sf.citidirect.com	v. 21.09.28	Page 32 of 44	© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									September 17, 2026

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

05/15/2026	1647637	27	11	(192,500.00)	-	-	16,000,000.00	08/05/2025	09/20/2021
04/17/2026	1647637	27	11	3,500.00	4,773,206.40	4,773,206.40	16,000,000.00	08/05/2025	09/20/2021
03/17/2026	1647637	27	11	3,500.00	5,432,179.86	5,470,484.83	16,000,000.00	08/05/2025	09/20/2021
02/18/2026	1647637	27	11	3,500.00	5,470,484.83	5,470,484.83	16,000,000.00	08/05/2025	09/20/2021
01/16/2026	1647637	27	11	3,500.00	5,506,705.17	5,506,705.17	16,000,000.00	08/05/2025	09/20/2021
12/17/2025	1647637	27	11	3,500.00	5,542,792.51	5,542,792.51	16,000,000.00	08/05/2025	09/20/2021
11/18/2025	1647637	27	11	3,500.00	5,579,408.23	5,615,228.60	16,000,000.00	08/05/2025	09/20/2021
10/20/2025	1647637	27	11	3,500.00	5,615,228.60	5,615,228.60	16,000,000.00	08/05/2025	09/20/2021
09/17/2025	1647637	27	11	3,500.00	5,651,586.88	5,687,142.21	16,000,000.00	08/05/2025	09/20/2021
08/15/2025	1647637	27	11	3,500.00	5,687,142.21	5,687,142.21	16,200,000.00	09/17/2024	09/20/2021
07/17/2025	1647637	27	11	3,500.00	5,722,566.98	5,722,566.98	16,200,000.00	09/17/2024	09/20/2021
06/17/2025	1647637	27	11	3,500.00	5,758,543.78	5,784,409.65	16,200,000.00	09/17/2024	09/20/2021
05/16/2025	1647637	27	11	3,500.00	8,316,178.80	8,316,178.80	16,200,000.00	09/17/2024	09/20/2021
04/17/2025	1647637	27	11	3,500.00	8,342,937.93	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
03/17/2025	1647637	27	11	3,500.00	8,368,610.56	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
02/18/2025	1647637	27	11	3,500.00	8,397,172.91	8,422,646.39	16,200,000.00	09/17/2024	09/20/2021
01/17/2025	1647637	27	11	3,500.00	8,422,646.39	8,448,026.33	16,200,000.00	09/17/2024	09/20/2021
12/17/2024	1647637	27	11	3,500.00	8,448,026.33	8,474,316.88	16,200,000.00	09/17/2024	09/20/2021
11/18/2024	1647637	27	11	3,500.00	8,474,316.88	8,499,507.08	16,200,000.00	09/17/2024	09/20/2021
10/18/2024	1647637	27	11	3,500.00	8,499,507.08	8,499,507.08	16,400,000.00	10/24/2023	09/20/2021
09/17/2024	1647637	27	11	3,500.00	8,525,614.66	8,525,614.66	16,400,000.00	10/24/2023	09/20/2021
08/16/2024	1647637	27	11	3,500.00	8,550,616.50	8,550,616.50	16,400,000.00	10/24/2023	09/20/2021
07/17/2024	1647637	27	11	3,500.00	8,575,526.53	8,575,526.53	16,400,000.00	10/24/2023	09/20/2021
06/17/2024	1647637	27	11	3,500.00	8,601,363.94	8,626,087.62	16,400,000.00	10/24/2023	09/20/2021
05/17/2024	1647637	27	11	3,500.00	8,626,087.62	8,626,087.62	16,400,000.00	10/24/2023	09/20/2021
04/17/2024	1647637	27	11	3,500.00	8,651,745.34	8,676,284.02	16,400,000.00	10/24/2023	09/20/2021
03/15/2024	1647637	27	11	3,500.00	8,676,284.02	8,676,284.02	16,400,000.00	10/24/2023	09/20/2021
02/16/2024	1647637	27	11	3,500.00	8,702,794.33	8,702,794.33	16,400,000.00	10/24/2023	09/20/2021
01/18/2024	1647637	27	11	3,500.00	8,727,145.56	8,751,407.37	16,400,000.00	10/24/2023	09/20/2021
12/15/2023	1647637	27	11	3,500.00	8,751,407.37	8,776,619.70	16,400,000.00	10/24/2023	09/20/2021
11/17/2023	1647637	27	11	3,500.00	8,776,619.70	8,776,619.70	18,200,000.00	12/01/2022	09/20/2021
10/17/2023	1647637	27	11	3,500.00	8,800,699.84	8,825,736.99	18,200,000.00	12/01/2022	09/20/2021
Reports Available at sf.citidirect.com			v. 21.09.28		Page 34 of 44				© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									September 17, 2026

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

09/15/2023	1647637	27	11	3,500.00	8,825,736.99	8,825,736.99	18,200,000.00	12/01/2022	09/20/2021
08/17/2023	1647637	27	11	3,500.00	8,849,636.77	8,849,636.77	18,200,000.00	12/01/2022	09/20/2021
07/17/2023	1647637	27	11	3,500.00	8,873,448.79	8,898,227.39	18,200,000.00	12/01/2022	09/20/2021
06/16/2023	1647637	27	11	3,500.00	8,898,227.39	8,898,227.39	18,200,000.00	12/01/2022	09/20/2021
05/17/2023	1647637	27	11	3,500.00	8,921,860.99	8,946,467.53	18,200,000.00	12/01/2022	09/20/2021
04/17/2023	1647637	27	11	3,500.00	8,946,467.53	8,946,467.53	18,200,000.00	12/01/2022	09/20/2021
03/17/2023	1647637	27	11	3,500.00	8,969,923.99	8,969,923.99	18,200,000.00	12/01/2022	09/20/2021
02/17/2023	1647637	27	11	3,500.00	8,996,491.28	8,996,491.28	18,200,000.00	12/01/2022	09/20/2021
01/18/2023	1647637	27	11	3,500.00	9,019,764.05	9,019,764.05	18,200,000.00	12/01/2022	09/20/2021
12/16/2022	1647637	27	11	3,500.00	9,042,951.36	9,042,951.36	18,200,000.00	12/01/2022	09/20/2021
11/18/2022	1647637	27	11	3,500.00	9,067,127.55	9,067,127.55	17,100,000.00	05/05/2017	09/20/2021
10/17/2022	1647637	27	11	3,500.00	9,090,140.94	9,090,140.94	17,100,000.00	05/05/2017	09/20/2021
09/16/2022	1647637	27	11	3,500.00	9,114,149.42	9,114,149.42	17,100,000.00	05/05/2017	09/20/2021
08/17/2022	1647637	27	11	3,500.00	9,136,990.15	9,159,747.00	17,100,000.00	05/05/2017	09/20/2021
07/15/2022	1647637	27	11	3,500.00	9,159,747.00	9,183,508.10	17,100,000.00	05/05/2017	09/20/2021
06/17/2022	1647637	27	11	3,500.00	9,183,508.10	9,183,508.10	17,100,000.00	05/05/2017	09/20/2021
05/17/2022	1647637	27	11	3,500.00	9,206,094.14	9,252,106.98	17,100,000.00	05/05/2017	09/20/2021
04/15/2022	1647637	27	11	3,500.00	9,229,690.52	9,252,106.98	17,100,000.00	05/05/2017	09/20/2021
03/17/2022	1647637	27	11	3,500.00	9,252,106.98	9,277,738.03	17,100,000.00	05/05/2017	09/20/2021
02/17/2022	1647637	27	13	3,500.00	9,277,738.03	9,299,978.05	17,100,000.00	05/05/2017	09/20/2021
01/18/2022	1647637	27	13	3,500.00	9,299,978.05	9,299,978.05	17,100,000.00	05/05/2017	09/20/2021
12/17/2021	1647637	27	13	3,500.00	9,322,136.41	9,322,136.41	17,100,000.00	05/05/2017	09/20/2021
11/18/2021	1647637	27	13	3,500.00	9,345,320.38	9,345,320.38	17,100,000.00	05/05/2017	09/20/2021
10/18/2021	1647637	27	13	3,500.00	9,367,312.24	9,367,312.24	17,100,000.00	05/05/2017	09/20/2021
03/17/2021	1648607	24	8	-	10,376,494.06	10,376,494.06	12,800,000.00	09/28/2020	08/10/2020	02/11/2021
02/18/2021	1648607	24	1	-	10,395,520.76	10,395,520.76	12,800,000.00	09/28/2020	08/10/2020
01/15/2021	1648607	24	1	-	10,410,402.46	10,425,223.98	12,800,000.00	09/28/2020	08/10/2020
12/17/2020	1648607	24	1	-	10,425,223.98	10,516,958.99	12,800,000.00	09/28/2020	08/10/2020
11/18/2020	1648607	24	1	-	10,441,347.57	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
10/19/2020	1648607	24	1	-	10,456,043.96	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
09/17/2020	1648607	24	13	-	10,472,046.92	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
08/17/2020	1648607	24	13	-	10,486,619.17	10,531,349.63	20,700,000.00	02/01/2017	08/10/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 35 of 44				© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									September 17, 2026

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

09/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
08/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
07/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
06/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
05/15/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
04/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	5,700,000.00	01/22/2026	01/21/2020
03/17/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
02/18/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
01/16/2026	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
12/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
11/18/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
10/20/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
09/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
08/15/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
07/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
06/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
05/16/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
04/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
03/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
02/18/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,100,000.00	01/14/2025	01/21/2020
01/17/2025	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
12/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
11/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
10/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
09/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
08/16/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
07/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
06/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
05/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
04/17/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
03/15/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
02/16/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	6,300,000.00	12/11/2023	01/21/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 36 of 44				© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									September 17, 2026

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

01/18/2024	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
12/15/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
11/17/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
10/17/2023	304101859	30	2	3,500.00	8,770,446.11	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
09/15/2023	304101859	30	2	3,500.00	8,786,300.63	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
08/17/2023	304101859	30	2	3,500.00	8,800,895.09	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
07/17/2023	304101859	30	2	3,500.00	8,815,428.10	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
06/16/2023	304101859	30	2	3,500.00	8,831,099.32	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
05/17/2023	304101859	30	2	3,500.00	8,845,505.16	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
04/17/2023	304101859	30	2	3,500.00	8,861,053.81	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
03/17/2023	304101859	30	2	3,500.00	8,875,333.54	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
02/17/2023	304101859	30	2	3,500.00	8,893,176.62	9,401,987.23	7,090,000.00	12/28/2022	01/21/2020
01/18/2023	304101859	30	2	3,500.00	8,907,321.10	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
12/16/2022	304101859	30	2	3,500.00	8,921,406.03	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
11/18/2022	304101859	30	2	3,500.00	8,936,645.39	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
10/17/2022	304101859	30	2	3,500.00	8,950,606.86	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
09/16/2022	304101859	30	2	3,500.00	8,965,727.22	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
08/17/2022	304101859	30	2	3,500.00	8,979,566.25	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
07/15/2022	304101859	30	2	3,500.00	8,993,347.01	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
06/17/2022	304101859	30	2	3,500.00	9,008,293.21	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
05/17/2022	304101859	30	2	3,500.00	9,021,953.02	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
04/15/2022	304101859	30	2	3,500.00	9,036,782.65	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
03/17/2022	304101859	30	2	3,500.00	9,050,322.51	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
02/17/2022	304101859	30	2	3,500.00	9,067,499.87	9,401,987.23	7,450,000.00	12/19/2021	01/21/2020
01/18/2022	304101859	30	2	3,500.00	9,080,910.41	9,401,987.23	8,330,000.00	01/14/2021	01/21/2020
12/17/2021	304101859	30	2	3,500.00	9,094,264.48	9,401,987.23	8,330,000.00	01/14/2021	01/21/2020
11/18/2021	304101859	30	2	3,500.00	9,108,799.44	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
10/18/2021	304101859	30	2	3,500.00	9,122,036.09	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
09/17/2021	304101859	30	2	3,500.00	9,136,457.88	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
08/17/2021	304101859	30	2	3,500.00	9,149,578.09	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
07/16/2021	304101859	30	2	3,500.00	9,162,643.06	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
06/17/2021	304101859	30	2	3,500.00	9,176,899.38	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
Reports Available at sf.citidirect.com			v. 21.09.28		Page 37 of 44				© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1									September 17, 2026

HISTORICAL SPECIALLY SERVICED LOANS


				Special Servicing	Ending	Ending	Most	Most Recent	Most Recent	Most Recent
Distribution			Workout	Fee Amount	Scheduled	Actual	Recent	Valuation	Special Servicer Master Servicer
Date	Loan ID	OMCR	Strategy (3)	Plus Adjustments	Balance	Balance	Value	Date	Transfer Date	Return Date

05/17/2021	304101859	30	2	3,500.00	9,189,849.32	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
04/16/2021	304101859	30	2	3,500.00	9,203,994.77	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
03/17/2021	304101859	30	2	3,500.00	9,216,830.63	9,413,989.49	8,330,000.00	01/14/2021	01/21/2020
02/18/2021	304101859	30	2	3,500.00	9,233,374.53	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
01/15/2021	304101859	30	2	3,500.00	9,246,086.69	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
12/17/2020	304101859	30	2	3,500.00	9,258,745.33	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
11/18/2020	304101859	30	2	3,500.00	9,272,610.03	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
10/19/2020	304101859	30	2	3,500.00	9,285,157.00	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
09/17/2020	304101859	30	2	3,500.00	9,298,914.07	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
08/17/2020	304101859	30	2	3,500.00	9,311,350.29	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
07/17/2020	304101859	30	2	3,500.00	9,323,734.15	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
06/17/2020	304101859	30	2	3,500.00	9,337,334.02	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
05/15/2020	304101859	30	2	3,500.00	9,349,608.49	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
04/17/2020	304101859	30	13	3,500.00	9,363,102.92	9,413,989.49	8,500,000.00	02/29/2020	01/21/2020
03/17/2020	304101859	30	13	3,500.00	9,375,268.89	9,413,989.49	13,900,000.00	02/15/2017	01/21/2020
02/18/2020	304101859	30	13	3,500.00	9,389,934.22	9,439,117.59	13,900,000.00	02/15/2017	01/21/2020
05/17/2021	304101861	4	8	5,441.48	52,142,057.56	52,142,057.56	65,600,000.00	10/29/2020	08/19/2020	04/21/2021
04/16/2021	304101861	4	1	(72,815.41)	52,238,198.79	52,327,266.50	82,000,000.00	07/06/2017	08/19/2020
03/17/2021	304101861	4	1	10,195.91	52,327,266.50	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
02/18/2021	304101861	4	13	11,307.34	52,436,131.77	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
01/15/2021	304101861	4	13	11,326.27	52,524,413.46	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
12/17/2020	304101861	4	13	10,980.56	52,612,344.58	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
11/18/2020	304101861	4	13	11,365.35	52,706,678.26	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
10/19/2020	304101861	4	13	11,018.23	52,793,885.58	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
09/17/2020	304101861	4	13	6,621.75	52,887,521.50	53,238,204.74	82,000,000.00	07/06/2017	08/19/2020
05/15/2020	307971614	23	8	-	11,908,830.85	11,908,830.85	55,750,000.00	04/07/2017		04/17/2020




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Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1								September 17, 2026

HISTORICAL UNSCHEDULED PRINCIPAL DETAIL


Distribution			Liquidation /	Liquid / Prepay	Principal	Principal	Prepayment Interest	Prepayment	Yield Maintenance
Date	Loan ID	OMCR	Prepayment Date	Code (5)	Collections	Adjustments	Excess / (Shortfall)	Penalties (PPP)	Penalties (YM)

6/17/2026	203041833	29	05/20/2026	9	9,324,143.20	-	-	-	93,391.39
5/15/2026	1647637	27	04/27/2026	9	4,733,715.23	-	-	-	143,196.19
4/17/2026	1647637	27	03/18/2026	1	622,478.45	-	-	-	-
6/17/2025	1647637	27	06/01/2025	1	2,531,769.15	-	-	-	-
4/17/2025	308511028	28	04/11/2025	2	8,807,720.12	-	-	-	-
7/17/2023	300801627	44	06/28/2023	9	4,540,137.60	-	-	-	45,473.64
6/17/2022	307971614	23	06/03/2022	5	11,446,234.79	-	-	-	-
5/17/2022	304101836	6	05/03/2022	2	42,000,000.00	-	-	-	-
9/17/2019	1749084	22	08/01/2018	11	3,156,779.24	-	-	-	254,846.27




Reports Available at sf.citidirect.com		v. 21.09.28			Page 40 of 44			© Copyright 2026 Citigroup


Citigroup Commercial Mortgage Trust 2017-B1
Commercial Mortgage Pass-Through Certificates, Series 2017-B1					September 17, 2026

CREFC® INVESTOR REPORTING PACKAGE LEGENDS

1\|CREFC Investor Reporting Package Legends
	Property Type (1)		Workout Strategy (3)		Liquidation/Prepayment Code (5)

MF	Multifamily	1	Modification	1	Partial Liquidation (Curtailment)
RT	Retail	2	Foreclosure	2	Payoff Prior To Maturity
HC	HealthCare	3	Bankruptcy	3	Disposition / Liquidation
IN	Industrial	4	Extension	4	Repurchase / Substitution
MH	Mobile Home Park	5	Note Sale	5	Full Payoff At Maturity
OF	Office	6	DPO	6	DPO
MU	Mixed Use	7	REO	7	Liquidation prior to 7/1/2006
LO	Lodging	8	Resolved	8	Payoff With Penalty
SS	Self Storage	9	Pending Return to Master Servicer	9	Payoff With Yield Maintenance
SE	Securities	10	Deed In Lieu of Foreclosure	10	Curtailment With Penalty
CH	Cooperative Housing	11	Full Payoff	11	Curtailment With Yield Maintenance
ZZ	Missing Information	12	Reps and Warranties
SF	SF	13	TBD
WH	Warehouse	98	Other
OT	Other

Modification Code (4)

	Payment Status of Loan (2)
		1	Maturity Date Extension
A	In Grace Period	2	Amortization Change
B	Late, but less than 30 Days	3	Principal Write-Off
0	Current	4	Blank (formerly Combination)
1	30-59 Days Delinquent	5	Temporary Rate Reduction
2	60-89 Days Delinquent	6	Capitalization of Interest
3	90-120 Days Delinquent	7	Capitalization of Taxes
4	Performing Matured Balloon	8	Other
5	Non Performing Matured Balloon	9	Combination
6	121+ Days Delinquent	10	Forbearance




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