Exhibit 21.1
SUBSIDIARIES OF REGISTRANT
The following is a list of subsidiaries of T-Mobile US, Inc. as of May 20, 2025. Certain subsidiaries were omitted which, considered in the aggregate, would not constitute a significant subsidiary.
| Name |
State of Incorporation | |
| ADstruc, LLC | Delaware | |
| APC Realty and Equipment Company, LLC | Delaware | |
| Assurance Wireless of South Carolina, LLC | Delaware | |
| Assurance Wireless USA, L.P. | Delaware | |
| ATI Sub, LLC | Delaware | |
| Blis Ad Platform Private Limited | India | |
| Blis Corp Ltd | United Kingdom | |
| Blis Global Limited | United Kingdom | |
| Blis Global Spain, S.L. | Spain | |
| Blis Group Limited | United Kingdom | |
| Blis Holdco Limited | United Kingdom | |
| Blis Italia S.r.l. | Italy | |
| BlisMedia (Australia) Pty Ltd | Australia | |
| Blis Media Pty Pte. Ltd. | Singapore | |
| Blis Netherlands B.V. | Netherlands | |
| Blis USA, Inc. | Delaware | |
| Breeze Acquisition Sub LLC | Delaware | |
| Clearwire Communications LLC | Delaware | |
| Clearwire International, LLC | Washington | |
| Clearwire Legacy LLC | Delaware | |
| Clearwire Spectrum Holdings II LLC | Nevada | |
| Clearwire Spectrum Holdings III LLC | Nevada | |
| Clearwire Spectrum Holdings LLC | Nevada | |
| Fiber JV Holdings LLC | Delaware | |
| Finco Depositor I LLC | Delaware | |
| Finco Depositor II LLC | Delaware | |
| Finco Depositor III LLC | Delaware | |
| Finco Depositor IV LLC | Delaware | |
| Finco Owner Trust IV | Delaware | |
| Finco Owner Trust V | Delaware | |
| Finco Owner Trust VI | Delaware | |
| Finco Owner Trust VII | Delaware | |
| Finco Owner Trust VIII | Delaware | |
| Finco Owner Trust IX | Delaware | |
| Finco Owner Trust X | Delaware |
| Name |
State of Incorporation | |
| Fixed Wireless Holdings, LLC | Delaware | |
| IBSV LLC | Delaware | |
| Kite JV Fiber Holdings LLC | Delaware | |
| Merlin JV Fiber Holdings LLC | Delaware | |
| MetroPCS California, LLC | Delaware | |
| MetroPCS Florida, LLC | Delaware | |
| MetroPCS Georgia, LLC | Delaware | |
| MetroPCS Massachusetts, LLC | Delaware | |
| MetroPCS Michigan, LLC | Delaware | |
| MetroPCS Nevada, LLC | Delaware | |
| MetroPCS New York, LLC | Delaware | |
| MetroPCS Pennsylvania, LLC | Delaware | |
| MetroPCS Texas, LLC | Delaware | |
| Mint Mobile, LLC | Delaware | |
| Mint Mobile Incentive Company, LLC | Delaware | |
| Nextel Systems, LLC | Delaware | |
| Nextel West Corp. | Delaware | |
| NSAC, LLC | Delaware | |
| Octopus Interactive Inc. | Delaware | |
| Play Octopus LLC | Delaware | |
| PRWireless PR, LLC | Delaware | |
| PushSpring, LLC | Delaware | |
| Slingshot Holding Sub, LLC | Delaware | |
| Sprint Capital Corporation | Delaware | |
| Sprint Communications LLC | Delaware | |
| Sprint Intermediate HoldCo II LLC | Delaware | |
| Sprint Intermediate HoldCo III LLC | Delaware | |
| Sprint Intermediate HoldCo LLC | Delaware | |
| Sprint LLC | Delaware | |
| Sprint Solutions LLC | Delaware | |
| Sprint Spectrum Co II LLC | Delaware | |
| Sprint Spectrum Co III LLC | Delaware | |
| Sprint Spectrum Co LLC | Delaware | |
| Sprint Spectrum Depositor II LLC | Delaware | |
| Sprint Spectrum Depositor III LLC | Delaware | |
| Sprint Spectrum Depositor LLC | Delaware | |
| Sprint Spectrum LLC | Delaware | |
| Sprint Spectrum License Holder II LLC | Delaware | |
| Sprint Spectrum License Holder III LLC | Delaware | |
| Sprint Spectrum License Holder LLC | Delaware | |
| Sprint Spectrum PledgeCo II LLC | Delaware | |
| Sprint Spectrum PledgeCo III LLC | Delaware | |
| Sprint Spectrum PledgeCo LLC | Delaware | |
| Sprint Spectrum Realty Company, LLC | Delaware |
2
| Name |
State of Incorporation | |
| SprintCom LLC | Kansas | |
| STC Five LLC | Delaware | |
| STC Four LLC | Delaware | |
| STC One LLC | Delaware | |
| STC Six Company | Delaware | |
| STC Three LLC | Delaware | |
| STC Two LLC | Delaware | |
| TDI Acquisition Sub, LLC | Delaware | |
| T-Mobile Airtime Funding LLC | Delaware | |
| T-Mobile Central LLC | Delaware | |
| T-Mobile Financial LLC | Delaware | |
| T-Mobile Global Care Corporation | Delaware | |
| T-Mobile Handset Funding LLC | Delaware | |
| T-Mobile Innovations LLC | Delaware | |
| T-Mobile Leasing LLC | Delaware | |
| T-Mobile License LLC | Delaware | |
| T-Mobile MW LLC | Delaware | |
| T-Mobile Northeast LLC | Delaware | |
| T-Mobile Puerto Rico Holdings LLC | Delaware | |
| T-Mobile Puerto Rico LLC | Delaware | |
| T-Mobile Reserved Subsidiary II LLC | Delaware | |
| T-Mobile Resources LLC | Delaware | |
| T-Mobile Secure Federal Operations LLC | Delaware | |
| T-Mobile South LLC | Delaware | |
| T-Mobile US Trust 2022-1 | Delaware | |
| T-Mobile US Trust 2024-1 | Delaware | |
| T-Mobile US Trust 2024-2 | Delaware | |
| T-Mobile US Trust 2025-1 | Delaware | |
| T-Mobile USA Foundation | Washington | |
| T-Mobile USA Tower LLC | Delaware | |
| T-Mobile USA, Inc. | Delaware | |
| T-Mobile Ventures LLC | Delaware | |
| T-Mobile West LLC | Delaware | |
| T-Mobile West Tower LLC | Delaware | |
| TMUS Assurance Corporation | Hawaii | |
| TMUS Fiber LLC | Delaware | |
| TMUS Fiber Reserved Merger Sub LLC | Delaware | |
| TMUS India Private Limited | India | |
| TMUS International Argentina S.R.L. | Argentina | |
| TMUS International Belgium BV | Belgium | |
| TMUS International Germany GmbH | Germany | |
| TMUS International Holdings LLC | Delaware | |
| TMUS International Japan Corporation | Japan | |
| TMUS International LLC | Delaware |
3
| Name |
State of Incorporation | |
| TMUS International Netherlands B.V. | Netherlands | |
| TMUS International Services Singapore Pte. Ltd. | Singapore | |
| TMUS International Spain, S.L. | Spain | |
| UVNV, LLC | Delaware | |
| Vistar Media Australia Pty Ltd | Australia | |
| Vistar Media Canada Inc. | Canada | |
| Vistar Media EMEA B.V. | Netherlands | |
| Vistar Media France | France | |
| Vistar Media Global Partners, LLC | New York | |
| Vistar Media GmbH | Germany | |
| Vistar Media Inc. | Delaware | |
| Vistar Media Japan GK | Japan | |
| Vistar Media New Zealand Limited | New Zealand | |
| Vistar Media SG Pte. Ltd. | Singapore | |
| Vistar Media UK Limited | United Kingdom | |
| VMU GP, LLC | Delaware | |
| WBSY Licensing, LLC | Delaware |
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