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 531
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-05-11 | 531-313-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | HASTINGS | NE |
| 2025-09-03 | 531-795-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2025-09-03 | 531-985-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2025-01-07 | 531-370-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | FREMONT | NE |
| 2024-02-22 | 531-317-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | HALLAM | NE |
| 2024-02-14 | 531-359-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2024-02-14 | 531-359-1XXX | 1000–1999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2024-02-14 | 531-359-2XXX | 2000–2999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2024-02-14 | 531-359-3XXX | 3000–3999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
| 2024-01-12 | 531-350-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2024-01-12 | 531-350-6XXX | 6000–6999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2023-03-02 | 531-305-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | HICKMAN | NE |
| 2023-03-02 | 531-331-1XXX | 1000–1999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | MARTELL | NE |
| 2022-11-15 | 531-310-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2022-10-03 | 531-291-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | CRETE | NE |
| 2022-03-08 | 531-276-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | MILFORD | NE |
| 2021-12-23 | 531-249-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2021-12-16 | 531-240-4XXX | 4000–4999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | ASHLAND | NE |
| 2021-03-23 | 531-230-1XXX | 1000–1999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | COLUMBUS | NE |
| 2021-03-10 | 531-257-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | VALENTINE | NE |
| 2021-03-08 | 531-254-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2020-12-14 | 531-519-6XXX | 6000–6999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | WAYNE | NE |
| 2020-08-11 | 531-249-1XXX | 1000–1999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2020-03-23 | 531-510-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-0XXX | 0000–0999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-1XXX | 1000–1999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-2XXX | 2000–2999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-3XXX | 3000–3999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-4XXX | 4000–4999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2016-04-12 | 531-500-5XXX | 5000–5999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | LINCOLN | NE |
| 2015-03-17 | 531-600-7XXX | 7000–7999 | Assigned | ALLO COMMUNICATIONS LLC | 907K | OMAHA | NE |
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.