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 903
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-02-01 | 903-601-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JEFFERSON | TX |
| 2013-02-01 | 903-618-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OWENTOWN | TX |
| 2012-11-12 | 903-853-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PITTSBURG | TX |
| 2011-10-28 | 903-626-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | JEWETT | TX |
| 2011-10-28 | 903-786-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | POTTSBORO | TX |
| 2011-08-30 | 903-380-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MTPLEASANT | TX |
| 2011-08-30 | 903-471-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MARSHALL | TX |
| 2011-08-30 | 903-622-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DEADWOOD | TX |
| 2011-08-30 | 903-631-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CARTHAGE | TX |
| 2011-08-30 | 903-884-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OMAHA | TX |
| 2011-05-24 | 903-416-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DENISON | TX |
| 2010-12-17 | 903-376-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MINEOLA | TX |
| 2010-12-17 | 903-747-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TYLER | TX |
| 2010-11-05 | 903-367-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LADONIA | TX |
| 2010-11-05 | 903-378-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HONEYGROVE | TX |
| 2010-11-05 | 903-401-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PARIS | TX |
| 2010-11-05 | 903-453-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GREENVILLE | TX |
| 2010-11-05 | 903-496-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOLFE CITY | TX |
| 2010-11-05 | 903-602-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CORSICANA | TX |
| 2010-11-05 | 903-873-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WILLSPOINT | TX |
| 2010-11-05 | 903-896-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | EDGEWOOD | 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.