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 251
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-04-28 | 251-725-7XXX | 7000–7999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2009-04-28 | 251-725-8XXX | 8000–8999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2009-02-20 | 251-447-1XXX | 1000–1999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2008-02-12 | 251-509-8XXX | 8000–8999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2008-02-12 | 251-509-9XXX | 9000–9999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2007-09-18 | 251-447-3XXX | 3000–3999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2007-09-18 | 251-447-4XXX | 4000–4999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2007-03-13 | 251-518-8XXX | 8000–8999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2007-03-13 | 251-518-9XXX | 9000–9999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2007-01-02 | 251-442-5XXX | 5000–5999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2006-04-21 | 251-442-4XXX | 4000–4999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
| 2006-01-04 | 251-234-9XXX | 9000–9999 | Assigned | CELLULAR SOUTH, INC. | 6581 | MOBILE | AL |
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.