
	Depreciable Lives	June 30, 2025		December 31, 2024
		(Dollars in millions)
Land	N/A	$	329	329
Fiber, conduit and other outside plant(1)	15-45 years	7,228		8,246
Central office and other network electronics(2)	7-10 years	5,312		5,792
Support assets(3)	3-30 years	2,905		2,878
Construction in progress(4)	N/A	299		530
Gross property, plant and equipment		16,073		17,775
Accumulated depreciation		(8,580)		(8,910)
Net property, plant and equipment		$	7,493	8,865

(1)Fiber, conduit and other outside plant consists of fiber and metallic cable, conduit, poles, and other supporting structures.

(2)Central office and other network electronics consists of circuit and packet switches, routers, transmission electronics, and electronics providing service to customers.

(3)Support assets consist of buildings, computers, and other administrative and support equipment.

(4)Construction in progress includes inventory held for construction and property of the aforementioned categories that has not been placed in service as it is still under construction.

As of June 30, 2025, we classified certain property, plant and equipment, net as held for sale and discontinued recording depreciation on the disposal group. See Note 2—Planned Divestiture of the Lumen Mass Markets Fiber-to-the-Home Business.

We recorded depreciation expense of $165 million and $348 million, respectively, for the three and six months ended June 30, 2025 and $175 million and $349 million, respectively, for the three and six months ended June 30, 2024.