NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026
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
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 |
|---|---|---|---|---|---|---|---|
| 2025-01-09 | 406-536-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOZEMAN | 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 | 406-693-5XXX | 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 |
| 2024-12-26 | 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 |
| 2024-12-17 | 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 |
| 2024-12-05 | 406-235-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WOLF CREEK | MT |
| 2024-12-05 | 406-417-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HELENA | MT |
| 2024-12-05 | 406-645-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DEER LODGE | MT |
| 2024-12-05 | 406-865-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DILLON | MT |
| 2024-12-05 | 406-980-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TOWNSEND | MT |
| 2024-11-27 | 406-229-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CUT BANK | MT |
| 2024-11-27 | 406-434-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SHELBY | MT |
| 2024-11-27 | 406-707-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LEWISTOWN | MT |
| 2024-11-27 | 406-807-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EGLACIERPK | MT |
| 2024-11-27 | 406-808-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAVRE | MT |
| 2024-02-22 | 406-425-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RED LODGE | MT |
| 2024-02-22 | 406-629-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HARDIN | MT |
| 2024-02-22 | 406-662-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRIDGER | MT |
| 2024-02-22 | 406-703-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COLUMBUS | MT |
| 2024-02-22 | 406-743-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LAUREL | MT |
| 2024-02-22 | 406-905-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOLIET | MT |
| 2024-02-22 | 406-997-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FROMBERG | MT |
| 2023-10-25 | 406-479-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTTE | MT |
| 2023-10-25 | 406-497-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTTE | MT |
| 2023-10-25 | 406-605-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTTE | MT |
| 2023-10-25 | 406-605-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTTE | MT |
| 2023-10-25 | 406-605-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTTE | MT |
| 2022-10-14 | 406-606-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-606-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-606-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-717-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-717-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-717-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-867-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-867-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
| 2022-10-14 | 406-867-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BILLINGS | MT |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.