Exhibit 21.1
LIST OF SUBSIDIARIES OF SES
| Legal Name of Subsidiary |
Jurisdiction of Incorporation or Organization | |
| Luxembourg Space Sector Development General Partner S.à r.l. | Luxembourg | |
| Luxembourg Space Sector Development SCSp | Luxembourg | |
| LuxGovSat S.A. | Luxembourg | |
| SES-17 S.à r.l. | Luxembourg | |
| SES Asia S.à r.l. | Luxembourg | |
| SES Astra S.A. | Luxembourg | |
| SES Astra Services Europe S.à r.l. | Luxembourg | |
| SES Engineering (Luxembourg) S.à r.l. | Luxembourg | |
| SES Insurance International (Luxembourg) S.A. | Luxembourg | |
| SES Insurance International Re (Luxembourg) S.A. | Luxembourg | |
| SES Latin America S.à r.l. | Luxembourg | |
| SES LU Satellite Holdings S.à r.l. | Luxembourg | |
| SES LU US Holdings S.à r.l. | Luxembourg | |
| SES mPOWER S.à r.l. | Luxembourg | |
| SES Networks Lux S.à r.l. | Luxembourg | |
| SES Networks Satellites S.à r.l. | Luxembourg | |
| SES Techcom S.A. | Luxembourg | |
| SES Astra 1P S.à r.l. | Luxembourg | |
| SES Satellites Ventures S.à r.l. | Luxembourg | |
| Société Européenne des Satellites Telecomunicaciones de Argentina S.A. | Argentina | |
| O3b Teleport Services (Australia) Pty Ltd. | Australia | |
| Redu Operations Services S.A. | Belgium | |
| Redu Space Services S.A. | Belgium | |
| Satellites Ventures (Bermuda) Ltd | Bermuda | |
| New Skies Satellites Ltda | Brazil | |
| SES DTH do Brasil Ltda | Brazil | |
| SES Satelites Directo Ltda | Brazil | |
| SES Telecomunicações do Brasil Ltda. | Brazil | |
| Northern Americas Satellite Ventures Inc. | Canada | |
| SES Telecomunicaciones de Chile SpA | Chile | |
| SES Telecomunicaciones de Colombia S.A.S. | Colombia | |
| ASTRA France S.A. | France | |
| HD Plus GmbH | Germany | |
| SES Germany GmbH | Germany | |
| SES Media Solutions GmbH | Germany | |
| SES HD Plus Ghana Limited Company | Ghana | |
| SES Satellites (Gibraltar) Limited | Gibraltar | |
| Jio Space Technology Limited | India | |
| Orbitconnect India Private Limited | India | |
| SES Satellites India Private Limited | India | |
| SES Global technology Services India Private Limited | India | |
| MX1 Limited | Israel | |
| O3b Limited | Jersey | |
| Sirius Satellite Services SIA | Latvia | |
| QuetzSat Directo S. de R.L. de C.V. | Mexico | |
| QuetzSat S. de R.L. de C.V. | Mexico | |
| Satelites Globales S. de R.L. de C.V. | Mexico | |
| SES Mexico, S. de R.L. de C.V. | Mexico | |
| New Skies Satellites BV | Netherlands |
| Legal Name of Subsidiary |
Jurisdiction of Incorporation or Organization | |
| New Skies Satellites Argentina BV | Netherlands | |
| New Skies Satellites Licensee BV | Netherlands | |
| New Skies Satellites Mar BV | Netherlands | |
| SES Engineering (Netherlands) BV | Netherlands | |
| SES Holdings (Netherlands) BV | Netherlands | |
| SES New Skies Marketing BV | Netherlands | |
| SES Satellite Nigeria Limited | Nigeria | |
| O3b Teleport Services (Peru) SAC | Peru | |
| O3b Services (Portugal) Ltda | Portugal | |
| SES Services Romania S.R.L. | Romania | |
| SES World Skies Singapore Pte Limited | Singapore | |
| SES ASTRA Africa Proprietary Limited | South Africa | |
| SES Satélites Ibérica, S.L. | Spain | |
| SES Astra AB | Sweden | |
| SES Finance Services AG | Switzerland | |
| SES Sirius Ukraina | Ukraine | |
| Al Maisan Satellite Communications Company LLC | UAE | |
| ASTRA (GB) Limited | UK | |
| SES Defence UK Limited | UK | |
| Americom Asia Pacific LLC | USA | |
| Global Enterprise Solutions Inc. | USA | |
| O3b Networks USA LLC | USA | |
| SES 5G Customer Services LLC | USA | |
| SES Americom (Asia 1A) LLC | USA | |
| SES Americom Inc. | USA | |
| SES Satellites International, LLC | USA | |
| SES Space and Defense, Inc. | USA | |
| SES US Satellite Holdings LLC | USA | |
| SES SD Mission Partners, Inc | USA |