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 |
|---|---|---|---|---|---|---|---|
| 2009-02-25 | 406-281-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BILLINGS | MT |
| 2009-02-20 | 406-403-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MT | 453F | GREATFALLS | MT |
| 2009-01-23 | 406-565-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BUTTE | MT |
| 2009-01-23 | 406-850-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BILLINGS | MT |
| 2009-01-23 | 406-850-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BILLINGS | MT |
| 2009-01-13 | 406-233-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | MILES CITY | MT |
| 2009-01-13 | 406-282-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | MANHATTAN | MT |
| 2009-01-13 | 406-285-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | THREEFORKS | MT |
| 2009-01-13 | 406-356-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | FORSYTH | MT |
| 2009-01-13 | 406-359-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | GLENDIVE | MT |
| 2009-01-13 | 406-480-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | SIDNEY | MT |
| 2009-01-13 | 406-534-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2009-01-13 | 406-578-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | WILSALL | MT |
| 2009-01-13 | 406-624-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BOZEMAN | MT |
| 2009-01-13 | 406-646-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | WYELLOWSTN | MT |
| 2009-01-13 | 406-668-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | FROMBERG | MT |
| 2009-01-13 | 406-686-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | CLYDE PARK | MT |
| 2009-01-13 | 406-748-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | COLSTRIP | MT |
| 2009-01-13 | 406-763-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | GALATNGTWY | MT |
| 2009-01-13 | 406-823-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | LIVINGSTON | MT |
| 2009-01-13 | 406-838-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | COOKE CITY | MT |
| 2009-01-13 | 406-848-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | GARDINER | MT |
| 2009-01-13 | 406-924-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BELGRADE | MT |
| 2008-10-29 | 406-290-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | COLUMBUS | MT |
| 2008-10-29 | 406-426-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | RED LODGE | MT |
| 2008-10-29 | 406-530-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | LAUREL | MT |
| 2008-10-29 | 406-623-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | HARDIN | MT |
| 2008-10-29 | 406-662-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BRIDGER | MT |
| 2008-10-29 | 406-962-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | JOLIET | MT |
| 2008-10-22 | 406-925-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DILLON | MT |
| 2008-10-22 | 406-945-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HAVRE | MT |
| 2008-10-22 | 406-961-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HAMILTON | MT |
| 2008-10-17 | 406-274-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2008-10-17 | 406-274-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2008-10-17 | 406-274-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | MISSOULA | MT |
| 2008-10-17 | 406-369-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | HAMILTON | MT |
| 2008-09-17 | 406-470-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | SHELBY | MT |
| 2008-09-10 | 406-217-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | GREATFALLS | MT |
| 2008-09-10 | 406-217-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | GREATFALLS | MT |
| 2008-09-10 | 406-260-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | KALISPELL | MT |
| 2008-09-10 | 406-260-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | KALISPELL | MT |
| 2008-09-10 | 406-422-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | HELENA | MT |
| 2008-09-10 | 406-839-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BILLINGS | MT |
| 2008-09-10 | 406-850-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BILLINGS | MT |
| 2008-09-10 | 406-850-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BILLINGS | MT |
| 2008-08-15 | 406-565-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BUTTE | MT |
| 2008-08-11 | 406-451-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BOZEMAN | MT |
| 2008-08-11 | 406-451-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BOZEMAN | MT |
| 2008-08-01 | 406-437-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | HELENA | MT |
| 2008-08-01 | 406-437-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | HELENA | 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.