NumberResearchRecent thousands-block assignments
10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 406
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-01-13 | 406-610-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2025-01-13 | 406-610-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2025-01-13 | 406-610-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2025-01-10 | 406-425-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | RED LODGE | MT |
| 2025-01-09 | 406-536-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOZEMAN | MT |
| 2025-01-07 | 406-593-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTTE | MT |
| 2025-01-07 | 406-982-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | YELLOW BAY | MT |
| 2025-01-06 | 406-514-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CULBERTSON | MT |
| 2025-01-06 | 406-610-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MISSOULA | MT |
| 2025-01-06 | 406-687-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | W GLENDIVE | MT |
| 2025-01-03 | 406-287-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITEHALL | MT |
| 2025-01-03 | 406-308-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASCADE | MT |
| 2025-01-03 | 406-476-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DUTTON | MT |
| 2025-01-03 | 406-617-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | BILLINGS | MT |
| 2025-01-03 | 406-693-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WARM SPG | MT |
| 2025-01-02 | 406-351-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FORSYTH | MT |
| 2025-01-02 | 406-518-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GALATNGTWY | MT |
| 2025-01-02 | 406-616-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | THREEFORKS | MT |
| 2025-01-02 | 406-641-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WYELLOWSTN | MT |
| 2025-01-02 | 406-848-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GARDINER | MT |
| 2024-12-31 | 406-617-0XXX | 0000–0999 | Assigned | NUSO, LLC | 732J | BILLINGS | MT |
| 2024-12-31 | 406-617-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | BILLINGS | MT |
| 2024-12-26 | 406-489-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SIDNEY | MT |
| 2024-12-26 | 406-578-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WILSALL | MT |
| 2024-12-26 | 406-796-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WIBAUX | MT |
| 2024-12-23 | 406-617-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2024-12-20 | 406-216-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREATFALLS | MT |
| 2024-12-20 | 406-482-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SIDNEY | MT |
| 2024-12-18 | 406-312-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | BOZEMAN | MT |
| 2024-12-18 | 406-536-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOZEMAN | MT |
| 2024-12-17 | 406-517-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LIVINGSTON | MT |
| 2024-12-17 | 406-742-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FAIRVIEW | MT |
| 2024-12-17 | 406-748-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COLSTRIP | MT |
| 2024-12-17 | 406-838-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COOKE CITY | MT |
| 2024-12-17 | 406-934-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MILES CITY | MT |
| 2024-12-17 | 406-987-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GLENDIVE | MT |
| 2024-12-16 | 406-242-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | THOMPSNFLS | MT |
| 2024-12-16 | 406-593-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTTE | MT |
| 2024-12-11 | 406-217-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | GREATFALLS | MT |
| 2024-12-09 | 406-406-0XXX | 0000–0999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-1XXX | 1000–1999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-2XXX | 2000–2999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-3XXX | 3000–3999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-4XXX | 4000–4999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-5XXX | 5000–5999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-6XXX | 6000–6999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-7XXX | 7000–7999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-8XXX | 8000–8999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-09 | 406-406-9XXX | 9000–9999 | Assigned | LIVEWIRE TELECOM, LLC | 509K | MISSOULA | MT |
| 2024-12-06 | 406-516-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | LAUREL | MT |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.