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 |
|---|---|---|---|---|---|---|---|
| 2007-02-21 | 406-235-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | WOLF CREEK | MT |
| 2007-02-21 | 406-266-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | TOWNSEND | MT |
| 2007-02-21 | 406-278-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | CONRAD | MT |
| 2007-02-21 | 406-284-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | MANHATTAN | MT |
| 2007-02-21 | 406-285-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | THREEFORKS | MT |
| 2007-02-21 | 406-287-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | WHITEHALL | MT |
| 2007-02-21 | 406-445-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | RED LODGE | MT |
| 2007-02-21 | 406-468-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | CASCADE | MT |
| 2007-02-21 | 406-476-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | DUTTON | MT |
| 2007-02-21 | 406-533-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BUTTE | MT |
| 2007-02-21 | 406-578-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | WILSALL | MT |
| 2007-02-21 | 406-626-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | FRENCHTOWN | MT |
| 2007-02-21 | 406-637-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | TERRY | MT |
| 2007-02-21 | 406-642-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | VICTOR | MT |
| 2007-02-21 | 406-646-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | WYELLOWSTN | MT |
| 2007-02-21 | 406-668-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | FROMBERG | MT |
| 2007-02-21 | 406-693-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | WARM SPG | MT |
| 2007-02-21 | 406-732-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | ST MARY | MT |
| 2007-02-21 | 406-747-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | FAIRVIEW | MT |
| 2007-02-21 | 406-748-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MT | 453F | COLSTRIP | MT |
| 2007-02-21 | 406-795-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | WIBAUX | MT |
| 2007-02-21 | 406-821-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | DARBY | MT |
| 2007-02-21 | 406-848-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | GARDINER | MT |
| 2007-02-21 | 406-962-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | JOLIET | MT |
| 2007-02-20 | 406-371-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2007-02-20 | 406-623-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HARDIN | MT |
| 2007-02-13 | 406-214-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MISSOULA | MT |
| 2007-02-12 | 406-890-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | KALISPELL | MT |
| 2007-02-07 | 406-434-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MT | 453F | SHELBY | MT |
| 2007-02-07 | 406-830-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MISSOULA | MT |
| 2007-02-07 | 406-897-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | COLUMBIFLS | MT |
| 2007-02-06 | 406-221-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BUTTE | MT |
| 2007-02-06 | 406-319-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MT | 453F | POLSON | MT |
| 2007-02-06 | 406-624-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BOZEMAN | MT |
| 2007-02-06 | 406-730-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MT | 453F | WHITEFISH | MT |
| 2007-01-26 | 406-952-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GREATFALLS | MT |
| 2007-01-19 | 406-214-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2007-01-19 | 406-214-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2007-01-19 | 406-214-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2007-01-15 | 406-890-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KALISPELL | MT |
| 2006-12-18 | 406-299-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BUTTE | MT |
| 2006-12-08 | 406-219-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BOZEMAN | MT |
| 2006-12-07 | 406-214-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2006-12-07 | 406-530-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | LAUREL | MT |
| 2006-11-09 | 406-371-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BILLINGS | MT |
| 2006-11-09 | 406-551-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BOZEMAN | MT |
| 2006-11-09 | 406-795-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | WIBAUX | MT |
| 2006-11-09 | 406-924-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BELGRADE | MT |
| 2006-11-01 | 406-952-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GREATFALLS | MT |
| 2006-10-19 | 406-235-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | WOLF CREEK | 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.