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 405
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-11-30 | 405-438-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2015-09-14 | 405-252-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2015-03-04 | 405-855-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | MIDWEST CY | OK |
| 2014-10-20 | 405-252-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2014-10-14 | 405-578-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | YUKON | OK |
| 2012-07-26 | 405-772-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2012-06-22 | 405-518-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | WHEATLAND | OK |
| 2012-06-22 | 405-518-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | WHEATLAND | OK |
| 2012-04-18 | 405-774-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2011-09-29 | 405-223-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2011-03-04 | 405-633-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2010-09-15 | 405-657-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | EDMOND | OK |
| 2009-07-30 | 405-515-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-07-30 | 405-515-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | NORMAN | OK |
| 2009-06-08 | 405-456-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2009-06-08 | 405-456-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2008-06-19 | 405-582-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | MIDWEST CY | OK |
| 2008-06-19 | 405-582-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | MIDWEST CY | OK |
| 2008-06-19 | 405-582-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | MIDWEST CY | OK |
| 2008-03-27 | 405-935-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-6XXX | 6000–6999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-8XXX | 8000–8999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-03-27 | 405-935-9XXX | 9000–9999 | Assigned | SOUTHWESTERN BELL | 9533 | BRITTON | OK |
| 2008-02-13 | 405-456-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2008-02-13 | 405-456-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2008-02-13 | 405-456-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2008-02-13 | 405-456-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2008-02-13 | 405-456-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2007-10-05 | 405-431-1XXX | 1000–1999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2007-10-05 | 405-431-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2007-10-05 | 405-431-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2007-10-05 | 405-431-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | OKLA CITY | OK |
| 2007-08-28 | 405-585-4XXX | 4000–4999 | Assigned | SOUTHWESTERN BELL | 9533 | SHAWNEE | OK |
| 2007-08-28 | 405-585-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | SHAWNEE | OK |
| 2007-06-25 | 405-518-3XXX | 3000–3999 | Assigned | SOUTHWESTERN BELL | 9533 | WHEATLAND | OK |
| 2006-12-08 | 405-622-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | MIDWEST CY | OK |
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.