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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-03-20 | 903-622-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | DEADWOOD | TX |
| 2012-06-22 | 903-380-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | MTPLEASANT | TX |
| 2011-05-05 | 903-602-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | CORSICANA | TX |
| 2011-03-18 | 903-606-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-606-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2011-03-18 | 903-607-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2010-04-12 | 903-702-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | MARSHALL | TX |
| 2009-07-28 | 903-617-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2009-04-14 | 903-946-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | PITTSBURG | TX |
| 2008-12-31 | 903-747-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2008-12-31 | 903-747-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2008-01-18 | 903-952-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | TYLER | TX |
| 2004-10-12 | 903-434-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | MTPLEASANT | 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.