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| Raw Number | 406221 |
| Basic Format | 406-221 |
| NPA (Area Code) | 406 |
| NXX | 221 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|
| 406-221-0XXX | 073H | TELNYX LLC | BUTTE | AS | 01/18/2024 | MT | WE | 02/16/2024 |
| 406-221-1XXX | 453F | ONVOY, LLC - MT | BUTTE | AS | 11/13/2012 | MT | WE | 12/13/2012 |
| 406-221-2XXX | 453F | ONVOY, LLC - MT | BUTTE | AS | 11/13/2012 | MT | WE | 12/13/2012 |
| 406-221-3XXX | 7229 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | BUTTE | AS | 02/06/2007 | MT | WE | 05/16/2007 |
| 406-221-4XXX | 453F | ONVOY, LLC - MT | BUTTE | AS | 11/13/2012 | MT | WE | 12/13/2012 |
| 406-221-5XXX | 453F | ONVOY, LLC - MT | BUTTE | AS | 11/13/2012 | MT | WE | 12/13/2012 |
| 406-221-6XXX | 6010 | NEW CINGULAR WIRELESS PCS, LLC | BUTTE | AS | 10/07/2010 | MT | WE | 11/05/2010 |
| 406-221-7XXX | 792K | CHARTER IP ENABLED SERVICES, LLC | BUTTE | AS | 07/10/2008 | MT | WE | 08/09/2008 |
| 406-221-8XXX | 073H | TELNYX LLC | BUTTE | AS | 07/14/2020 | MT | WE | 08/07/2020 |
| 406-221-9XXX | 520K | TDS METROCOM, LLC | BUTTE | AS | 09/24/2025 | MT | WE | 11/17/2025 |
| 406-221-XXXX | 453F | ONVOY, LLC - MT | BUTTE | AS | 02/13/2003 | MT |
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