NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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, all time — NPA 406
New assignments by month
Sep 2026
Aug 2026
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Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-08-18 | 406-557-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JORDAN | MT |
| 2026-08-18 | 406-772-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PLEVNA | MT |
| 2026-08-18 | 406-775-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | EKALAKA | MT |
| 2026-08-18 | 406-891-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BAKER | MT |
| 2026-08-18 | 406-930-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BIG TIMBER | MT |
| 2026-08-18 | 406-974-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CIRCLE | MT |
| 2026-08-18 | 406-989-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | W GLENDIVE | MT |
| 2026-07-07 | 406-460-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SHELBY | MT |
| 2026-07-07 | 406-822-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUPERIOR | MT |
| 2026-07-07 | 406-949-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TOWNSEND | MT |
| 2026-07-07 | 406-951-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MILES CITY | MT |
| 2026-06-11 | 406-391-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CUT BANK | MT |
| 2026-06-11 | 406-553-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DIVIDE | MT |
| 2026-06-11 | 406-576-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CONRAD | MT |
| 2026-06-11 | 406-593-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BUTTE | MT |
| 2026-06-11 | 406-644-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHARLO | MT |
| 2026-06-11 | 406-649-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ST REGIS | MT |
| 2026-06-11 | 406-726-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ARLEE | MT |
| 2026-06-11 | 406-846-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DEER LODGE | MT |
| 2026-06-11 | 406-854-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MARION | MT |
| 2026-06-11 | 406-865-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DILLON | MT |
| 2026-06-11 | 406-879-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAVRE | MT |
| 2026-06-11 | 406-881-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | OLNEY | 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 |
| 2026-04-06 | 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 |
| 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 |
| 2025-11-03 | 406-961-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HAMILTON | MT |
| 2025-10-07 | 406-699-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HARDIN | 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 |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.