NumberResearchRecent thousands-block assignments
0 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, all time — NPA 406
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-06-10 | 406-457-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | HELENA | MT |
| 2024-10-03 | 406-919-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BELGRADE | MT |
| 2023-03-09 | 406-445-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | RED LODGE | MT |
| 2022-12-12 | 406-614-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BIGFORK | MT |
| 2021-04-05 | 406-765-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | PLENTYWOOD | MT |
| 2020-07-28 | 406-501-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | WHITEHALL | MT |
| 2020-07-28 | 406-616-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | THREEFORKS | MT |
| 2020-07-14 | 406-638-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | HARDIN | MT |
| 2020-06-15 | 406-283-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | LIBBY | MT |
| 2019-08-01 | 406-317-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | MISSOULA | MT |
| 2019-04-19 | 406-792-0XXX | 0000–0999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BUTTE | MT |
| 2019-04-11 | 406-925-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | DILLON | MT |
| 2019-03-27 | 406-748-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | COLSTRIP | MT |
| 2019-03-27 | 406-968-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | LEWISTOWN | MT |
| 2019-03-14 | 406-944-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | MILES CITY | MT |
| 2018-03-22 | 406-333-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | LIVINGSTON | MT |
| 2017-07-26 | 406-413-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BILLINGS | MT |
| 2017-05-25 | 406-602-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BOZEMAN | MT |
| 2017-03-20 | 406-831-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BILLINGS | MT |
| 2016-03-11 | 406-743-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | LAUREL | MT |
| 2016-02-19 | 406-808-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | HAVRE | MT |
| 2015-05-19 | 406-884-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | POLSON | MT |
| 2015-04-23 | 406-863-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | WHITEFISH | MT |
| 2015-02-13 | 406-943-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | SIDNEY | MT |
| 2014-10-22 | 406-417-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | HELENA | MT |
| 2014-09-23 | 406-299-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BUTTE | MT |
| 2014-07-14 | 406-577-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BOZEMAN | MT |
| 2014-05-13 | 406-300-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | KALISPELL | MT |
| 2013-02-22 | 406-770-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | GREATFALLS | MT |
| 2012-04-17 | 406-200-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | BILLINGS | MT |
| 2012-04-17 | 406-303-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MT - LLC | 771G | MISSOULA | 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.