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| Raw Number | 406440 |
| Basic Format | 406-440 |
| NPA (Area Code) | 406 |
| NXX | 440 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|
| 406-440-0XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-1XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-2XXX | 6010 | NEW CINGULAR WIRELESS PCS, LLC | HELENA | AS | 08/19/2025 | MT | WE | 09/14/2025 |
| 406-440-3XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-4XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-5XXX | 6529 | T-MOBILE USA, INC. | HELENA | AS | 01/24/2024 | MT | WE | 02/22/2024 |
| 406-440-6XXX | 6529 | T-MOBILE USA, INC. | HELENA | AS | 01/24/2024 | MT | WE | 02/22/2024 |
| 406-440-7XXX | 520K | TDS METROCOM, LLC | HELENA | AS | 09/24/2025 | MT | WE | 11/17/2025 |
| 406-440-8XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-9XXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | RT | MT | WE | ||
| 406-440-XXXX | 3924 | 3 RIVERS TELEPHONE COOPERATIVE, INC. - MT | HELENA | AS | 07/01/2005 | MT |
Reports
Anonymous User from , OH
March 6, 2026 at 11:32 AM
Anonymous User from Clancy, Montana
January 10, 2023 at 12:35 PM