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 325
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-02-01 | 325-773-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | STAMFORD | TX |
| 2013-02-01 | 325-776-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROBY | TX |
| 2012-11-14 | 325-219-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SWEETWATER | TX |
| 2011-12-12 | 325-268-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ABILENE | TX |
| 2011-12-12 | 325-515-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNYDER | TX |
| 2011-12-12 | 325-576-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HAMLIN | TX |
| 2011-12-12 | 325-735-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROTAN | TX |
| 2011-12-12 | 325-750-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | COLORADOCY | TX |
| 2011-12-12 | 325-762-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ALBANY | TX |
| 2011-12-12 | 325-823-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ANSON | TX |
| 2011-12-12 | 325-863-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HERMLEIGH | TX |
| 2011-12-12 | 325-936-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ROSCOE | TX |
| 2011-09-28 | 325-229-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WESTBROOK | TX |
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.