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| Raw Number | 406617 |
| Basic Format | 406-617 |
| NPA (Area Code) | 406 |
| NXX | 617 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|---|
| 406-617-0XXX | 732J | NUSO, LLC | BILLINGS | AS | 12/31/2024 | BILLINGS | MT | WE | 02/17/2025 |
| 406-617-1XXX | 732J | NUSO, LLC | BILLINGS | AS | 12/31/2024 | BILLINGS | MT | WE | 02/17/2025 |
| 406-617-2XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 03/07/2025 | BILLINGS | MT | WE | 04/05/2025 |
| 406-617-3XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 07/28/2025 | BILLINGS | MT | WE | 08/07/2025 |
| 406-617-4XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 06/26/2025 | BILLINGS | MT | WE | 07/08/2025 |
| 406-617-5XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 06/26/2025 | BILLINGS | MT | WE | 07/08/2025 |
| 406-617-6XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 05/15/2025 | BILLINGS | MT | WE | 06/14/2025 |
| 406-617-7XXX | 073H | TELNYX LLC | BILLINGS | AS | 01/03/2025 | BILLINGS | MT | WE | 02/17/2025 |
| 406-617-8XXX | 6010 | NEW CINGULAR WIRELESS PCS, LLC | BILLINGS | AS | 12/23/2024 | BILLINGS | MT | WE | 02/16/2025 |
| 406-617-9XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 01/07/2026 | BILLINGS | MT | WE | 03/02/2026 |
| 406-617-XXXX | 6010 | NEW CINGULAR WIRELESS PCS, LLC | BILLINGS | AS | 12/23/2024 | BILLINGS | MT |
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