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 |
|---|---|---|---|---|---|---|---|
| 2006-10-19 | 406-626-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | FRENCHTOWN | MT |
| 2006-10-10 | 406-924-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | BELGRADE | MT |
| 2006-10-06 | 406-219-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | BOZEMAN | MT |
| 2006-10-03 | 406-839-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BILLINGS | MT |
| 2006-09-21 | 406-233-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | MILES CITY | MT |
| 2006-09-21 | 406-333-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | LIVINGSTON | MT |
| 2006-09-21 | 406-359-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | GLENDIVE | MT |
| 2006-09-21 | 406-530-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | LAUREL | MT |
| 2006-09-21 | 406-623-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | HARDIN | MT |
| 2006-09-21 | 406-630-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | SIDNEY | MT |
| 2006-09-20 | 406-262-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | HAVRE | MT |
| 2006-09-20 | 406-369-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | HAMILTON | MT |
| 2006-09-20 | 406-625-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | STEVENSVL | MT |
| 2006-09-20 | 406-708-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | LEWISTOWN | MT |
| 2006-09-20 | 406-797-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | ANACONDA | MT |
| 2006-09-20 | 406-846-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | DEER LODGE | MT |
| 2006-09-20 | 406-873-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | CUT BANK | MT |
| 2006-09-20 | 406-988-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | DILLON | MT |
| 2006-09-12 | 406-214-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2006-09-12 | 406-214-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2006-08-11 | 406-534-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | BILLINGS | MT |
| 2006-08-09 | 406-214-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2006-07-20 | 406-218-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MISSOULA | MT |
| 2006-07-11 | 406-548-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | BOZEMAN | MT |
| 2006-06-14 | 406-258-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | MISSOULA | MT |
| 2006-06-14 | 406-371-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | BILLINGS | MT |
| 2006-06-12 | 406-278-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | CONRAD | MT |
| 2006-06-07 | 406-493-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MISSOULA | MT |
| 2006-06-05 | 406-873-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CUT BANK | MT |
| 2006-05-26 | 406-281-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2006-05-26 | 406-371-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2006-05-26 | 406-371-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2006-05-26 | 406-945-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAVRE | MT |
| 2006-05-05 | 406-333-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LIVINGSTON | MT |
| 2006-05-05 | 406-375-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HAMILTON | MT |
| 2006-05-02 | 406-258-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | MISSOULA | MT |
| 2006-05-02 | 406-299-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | BUTTE | MT |
| 2006-05-02 | 406-324-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | HELENA | MT |
| 2006-05-02 | 406-551-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | BOZEMAN | MT |
| 2006-04-25 | 406-356-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | FORSYTH | MT |
| 2006-04-17 | 406-330-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLINTON | MT |
| 2006-04-06 | 406-393-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SOMERS | MT |
| 2006-03-31 | 406-552-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | MISSOULA | MT |
| 2006-03-21 | 406-794-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | BILLINGS | MT |
| 2006-03-14 | 406-563-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ANACONDA | MT |
| 2006-03-14 | 406-988-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DILLON | MT |
| 2006-03-10 | 406-403-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2006-03-06 | 406-420-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BIGFORK | MT |
| 2006-03-06 | 406-571-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | FINLEY PT | MT |
| 2006-03-06 | 406-730-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WHITEFISH | 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.