NumberResearchRecent thousands-block assignments
0 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, all time — NPA 406
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-09 | 406-992-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 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 |
| 2024-08-30 | 406-405-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | LIBBY | MT |
| 2024-04-08 | 406-558-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 2024-04-08 | 406-558-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 2024-04-08 | 406-558-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 2024-03-29 | 406-391-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | CUT BANK | MT |
| 2024-03-29 | 406-836-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2024-03-29 | 406-836-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2024-03-29 | 406-866-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2024-03-18 | 406-405-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | LIBBY | MT |
| 2024-03-18 | 406-507-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | WHITEFISH | MT |
| 2024-03-18 | 406-516-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | LAUREL | MT |
| 2024-03-18 | 406-951-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MT | 453F | MILES CITY | MT |
| 2024-03-08 | 406-593-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | BUTTE | MT |
| 2024-03-08 | 406-605-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | BUTTE | MT |
| 2024-01-12 | 406-503-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2024-01-12 | 406-503-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2024-01-12 | 406-503-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2024-01-12 | 406-503-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2024-01-12 | 406-901-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2023-08-30 | 406-437-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 2023-08-30 | 406-481-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2023-08-30 | 406-481-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2023-08-04 | 406-481-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2023-07-21 | 406-235-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | WOLF CREEK | MT |
| 2023-07-21 | 406-289-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | CONRAD | MT |
| 2023-07-21 | 406-405-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | LIBBY | MT |
| 2023-07-21 | 406-503-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2023-07-21 | 406-503-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2023-07-21 | 406-503-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2023-07-21 | 406-512-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | BOULDER | MT |
| 2023-07-21 | 406-626-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MT | 453F | FRENCHTOWN | MT |
| 2023-07-21 | 406-646-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | WYELLOWSTN | MT |
| 2023-07-21 | 406-668-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | FROMBERG | MT |
| 2023-07-21 | 406-729-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MT | 453F | WILSALL | MT |
| 2023-07-21 | 406-748-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | COLSTRIP | MT |
| 2023-07-21 | 406-815-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | RED LODGE | MT |
| 2023-07-21 | 406-836-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2023-07-21 | 406-836-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2023-05-04 | 406-597-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | SHELBY | MT |
| 2023-03-03 | 406-391-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MT | 453F | CUT BANK | MT |
| 2023-03-03 | 406-512-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MT | 453F | BOULDER | MT |
| 2023-02-14 | 406-629-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | HARDIN | MT |
| 2023-02-14 | 406-836-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2022-11-09 | 406-289-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | CONRAD | MT |
| 2022-11-04 | 406-380-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | LEWISTOWN | MT |
| 2022-10-19 | 406-760-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | 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.