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| Raw Number | 406503 |
| Basic Format | 406-503 |
| NPA (Area Code) | 406 |
| NXX | 503 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|
| 406-503-0XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 07/21/2023 | MT | WE | 08/20/2023 |
| 406-503-1XXX | 318J | COMCAST IP PHONE, LLC | BILLINGS | AS | 04/05/2023 | MT | WE | 06/04/2023 |
| 406-503-2XXX | 6529 | T-MOBILE USA, INC. | BILLINGS | AS | 01/16/2024 | MT | WE | 01/26/2024 |
| 406-503-3XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 01/12/2024 | MT | WE | 02/09/2024 |
| 406-503-4XXX | 5562 | METROPCS, INC. | BILLINGS | AS | 08/31/2023 | MT | WE | 09/24/2023 |
| 406-503-5XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 01/12/2024 | MT | WE | 02/09/2024 |
| 406-503-6XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 01/12/2024 | MT | WE | 02/09/2024 |
| 406-503-7XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 01/12/2024 | MT | WE | 02/09/2024 |
| 406-503-8XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 07/21/2023 | MT | WE | 08/20/2023 |
| 406-503-9XXX | 453F | ONVOY, LLC - MT | BILLINGS | AS | 07/21/2023 | MT | WE | 08/20/2023 |
| 406-503-XXXX | 318J | COMCAST IP PHONE, LLC | BILLINGS | AS | 04/05/2023 | MT |
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