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 |
|---|---|---|---|---|---|---|---|
| 2025-12-08 | 406-867-5XXX | 5000–5999 | Assigned | WAVENATION, LLC | 700J | BILLINGS | MT |
| 2025-12-04 | 406-618-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MISSOULA | MT |
| 2025-11-13 | 406-955-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | KALISPELL | MT |
| 2025-11-12 | 406-916-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | HELENA | MT |
| 2025-11-12 | 406-953-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | HARDIN | MT |
| 2025-11-06 | 406-219-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BOZEMAN | MT |
| 2025-11-04 | 406-931-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT | 6564 | BIG TIMBER | MT |
| 2025-11-03 | 406-961-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAMILTON | MT |
| 2025-10-09 | 406-435-0XXX | 0000–0999 | Assigned | TDS METROCOM, LLC | 520K | BILLINGS | MT |
| 2025-10-09 | 406-618-2XXX | 2000–2999 | Assigned | TDS METROCOM, LLC | 520K | MISSOULA | MT |
| 2025-10-07 | 406-699-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HARDIN | MT |
| 2025-09-25 | 406-558-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HELENA | MT |
| 2025-09-24 | 406-221-9XXX | 9000–9999 | Assigned | TDS METROCOM, LLC | 520K | BUTTE | MT |
| 2025-09-24 | 406-268-5XXX | 5000–5999 | Assigned | TDS METROCOM, LLC | 520K | GREATFALLS | MT |
| 2025-09-24 | 406-440-7XXX | 7000–7999 | Assigned | TDS METROCOM, LLC | 520K | HELENA | MT |
| 2025-09-23 | 406-536-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BOZEMAN | MT |
| 2025-09-17 | 406-621-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FORTBENTON | MT |
| 2025-09-17 | 406-649-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ST REGIS | MT |
| 2025-09-17 | 406-654-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MALTA | MT |
| 2025-09-17 | 406-677-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SEELEYLAKE | MT |
| 2025-09-17 | 406-709-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LAKESIDE | MT |
| 2025-09-17 | 406-826-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PLAINS | MT |
| 2025-09-17 | 406-857-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SOMERS | MT |
| 2025-09-17 | 406-886-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SWAN LAKE | MT |
| 2025-09-17 | 406-887-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FINLEY PT | MT |
| 2025-09-17 | 406-945-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAVRE | MT |
| 2025-09-17 | 406-949-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TOWNSEND | MT |
| 2025-09-17 | 406-988-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DILLON | MT |
| 2025-09-15 | 406-225-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BOULDER | MT |
| 2025-09-15 | 406-235-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WOLF CREEK | MT |
| 2025-09-15 | 406-278-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CONRAD | MT |
| 2025-09-15 | 406-310-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BUTTE | MT |
| 2025-09-15 | 406-332-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PABLO | MT |
| 2025-09-15 | 406-340-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LIMA | MT |
| 2025-09-15 | 406-391-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CUT BANK | MT |
| 2025-09-15 | 406-434-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SHELBY | MT |
| 2025-09-15 | 406-515-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUPERIOR | MT |
| 2025-09-15 | 406-553-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DIVIDE | MT |
| 2025-09-15 | 406-644-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHARLO | MT |
| 2025-09-15 | 406-726-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ARLEE | MT |
| 2025-09-15 | 406-820-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | OLNEY | MT |
| 2025-09-15 | 406-846-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DEER LODGE | MT |
| 2025-09-15 | 406-878-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GREATFALLS | MT |
| 2025-09-15 | 406-884-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | POLSON | MT |
| 2025-09-15 | 406-982-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | YELLOW BAY | MT |
| 2025-09-15 | 406-991-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MARION | MT |
| 2025-09-12 | 406-242-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | THOMPSNFLS | MT |
| 2025-09-12 | 406-330-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLINTON | MT |
| 2025-09-12 | 406-399-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SOUTHHAVRE | MT |
| 2025-09-12 | 406-559-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ANACONDA | 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.