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 |
|---|---|---|---|---|---|---|---|
| 2022-09-22 | 406-970-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2022-09-16 | 406-550-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MISSOULA | MT |
| 2022-09-16 | 406-550-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MISSOULA | MT |
| 2022-09-08 | 406-260-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | KALISPELL | MT |
| 2022-09-08 | 406-405-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MT | 453F | LIBBY | MT |
| 2022-09-08 | 406-405-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LIBBY | MT |
| 2022-09-08 | 406-609-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | KALISPELL | MT |
| 2022-09-07 | 406-506-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2022-09-06 | 406-831-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2022-08-31 | 406-325-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | BILLINGS | MT |
| 2022-08-31 | 406-402-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | GREATFALLS | MT |
| 2022-08-31 | 406-613-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | BOZEMAN | MT |
| 2022-08-18 | 406-589-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BOZEMAN | MT |
| 2022-08-18 | 406-898-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BOZEMAN | MT |
| 2022-08-18 | 406-916-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | HELENA | MT |
| 2022-08-17 | 406-608-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2022-08-17 | 406-608-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2022-08-17 | 406-608-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2022-08-17 | 406-608-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2022-08-12 | 406-770-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREATFALLS | MT |
| 2022-08-12 | 406-894-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | BILLINGS | MT |
| 2022-08-05 | 406-894-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2022-08-03 | 406-218-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | MISSOULA | MT |
| 2022-08-02 | 406-808-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | HAVRE | MT |
| 2022-08-02 | 406-922-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOZEMAN | MT |
| 2022-07-27 | 406-296-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MT | 453F | EUREKA | MT |
| 2022-07-27 | 406-375-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MT | 453F | HAMILTON | MT |
| 2022-07-14 | 406-413-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2022-07-11 | 406-479-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BUTTE | MT |
| 2022-07-05 | 406-920-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BOZEMAN | MT |
| 2022-06-29 | 406-530-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LAUREL | MT |
| 2022-06-29 | 406-613-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | BOZEMAN | MT |
| 2022-06-29 | 406-851-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | MILES CITY | MT |
| 2022-06-27 | 406-718-4XXX | 4000–4999 | Assigned | TWILIO INTERNATIONAL, INC. | 506J | DARBY | MT |
| 2022-06-27 | 406-719-5XXX | 5000–5999 | Assigned | TWILIO INTERNATIONAL, INC. | 506J | FROMBERG | MT |
| 2022-06-22 | 406-920-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOZEMAN | MT |
| 2022-06-21 | 406-480-8XXX | 8000–8999 | Assigned | VONAGE AMERICA LLC | 197D | SIDNEY | MT |
| 2022-06-17 | 406-920-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BOZEMAN | MT |
| 2022-06-16 | 406-613-1XXX | 1000–1999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOZEMAN | MT |
| 2022-06-16 | 406-613-2XXX | 2000–2999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOZEMAN | MT |
| 2022-06-16 | 406-613-3XXX | 3000–3999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOZEMAN | MT |
| 2022-06-16 | 406-613-4XXX | 4000–4999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOZEMAN | MT |
| 2022-06-16 | 406-613-5XXX | 5000–5999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOZEMAN | MT |
| 2022-06-09 | 406-640-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | WYELLOWSTN | MT |
| 2022-06-06 | 406-894-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BILLINGS | MT |
| 2022-05-11 | 406-416-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | FORSYTH | MT |
| 2022-04-20 | 406-519-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MISSOULA | MT |
| 2022-04-20 | 406-519-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MISSOULA | MT |
| 2022-04-08 | 406-302-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | WOLF CREEK | MT |
| 2022-04-05 | 406-699-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HARDIN | 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.