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 |
|---|---|---|---|---|---|---|---|
| 2026-06-04 | 406-225-2XXX | 2000–2999 | Assigned | EXIANT COMMUNICATIONS LLC | 114J | BOULDER | MT |
| 2026-05-20 | 406-489-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | SIDNEY | MT |
| 2026-05-12 | 406-560-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ANACONDA | MT |
| 2026-05-12 | 406-825-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLINTON | MT |
| 2026-05-12 | 406-933-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HELENA | MT |
| 2026-05-11 | 406-380-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LEWISTOWN | MT |
| 2026-04-23 | 406-568-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | RYEGATE | MT |
| 2026-04-22 | 406-677-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SEELEYLAKE | MT |
| 2026-04-20 | 406-566-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | STANFORD | MT |
| 2026-04-17 | 406-342-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | HYSHAM | MT |
| 2026-04-17 | 406-429-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | WINNETT | MT |
| 2026-04-15 | 406-929-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | HUNGRYHORS | MT |
| 2026-04-10 | 406-248-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2026-04-10 | 406-318-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | BILLINGS | MT |
| 2026-04-10 | 406-436-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | BROADUS | MT |
| 2026-04-10 | 406-557-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | JORDAN | MT |
| 2026-04-10 | 406-775-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MT | 9415 | EKALAKA | MT |
| 2026-04-06 | 406-230-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GLASGOW | MT |
| 2026-04-06 | 406-774-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LAMBERT | MT |
| 2026-04-06 | 406-913-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROUNDUP | MT |
| 2026-04-06 | 406-940-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MOLT | MT |
| 2026-04-06 | 406-954-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROY | MT |
| 2026-04-03 | 406-330-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CLINTON | MT |
| 2026-03-23 | 406-703-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | COLUMBUS | MT |
| 2026-03-13 | 406-514-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CULBERTSON | MT |
| 2026-03-13 | 406-610-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MISSOULA | MT |
| 2026-03-10 | 406-961-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAMILTON | MT |
| 2026-02-17 | 406-633-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | LAUREL | MT |
| 2026-02-13 | 406-987-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MT | 994E | GLENDIVE | MT |
| 2026-02-04 | 406-357-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | CHINOOK | MT |
| 2026-01-29 | 406-268-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GREATFALLS | MT |
| 2026-01-15 | 406-918-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LIBBY | MT |
| 2026-01-09 | 406-231-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | GREATFALLS | MT |
| 2026-01-07 | 406-617-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2026-01-07 | 406-831-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | BILLINGS | MT |
| 2025-12-19 | 406-517-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | LIVINGSTON | MT |
| 2025-12-19 | 406-517-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | LIVINGSTON | MT |
| 2025-12-18 | 406-350-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LEWISTOWN | MT |
| 2025-12-18 | 406-391-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CUT BANK | MT |
| 2025-12-18 | 406-482-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SIDNEY | MT |
| 2025-12-11 | 406-790-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CULBERTSON | MT |
| 2025-12-11 | 406-930-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BIG TIMBER | MT |
| 2025-12-11 | 406-935-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BROADUS | MT |
| 2025-12-11 | 406-939-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | W GLENDIVE | MT |
| 2025-12-11 | 406-971-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PLEVNA | MT |
| 2025-12-11 | 406-973-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SIDNEY | MT |
| 2025-12-11 | 406-974-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CIRCLE | MT |
| 2025-12-11 | 406-975-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | EKALAKA | MT |
| 2025-12-11 | 406-977-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JORDAN | MT |
| 2025-12-11 | 406-978-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BAKER | 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.