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 307
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-05-19 | 307-483-5XXX | 5000–5999 | Assigned | ALL WEST/WYOMING, INC. | 3880 | RAWLINS | WY |
| 2020-05-07 | 307-770-5XXX | 5000–5999 | Assigned | ALL WEST/WYOMING, INC. | 3880 | FARSON | WY |
| 2018-06-14 | 307-364-5XXX | 5000–5999 | Assigned | ALL WEST/WYOMING, INC. | 3880 | GREENRIVER | WY |
| 2018-06-14 | 307-522-5XXX | 5000–5999 | Assigned | ALL WEST/WYOMING, INC. | 3880 | ROCK SPG | WY |
| 2016-03-21 | 307-800-8XXX | 8000–8999 | Assigned | ALL WEST/WYOMING, INC. | 3880 | KEMMERER | WY |
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.