NumberResearchRecent thousands-block assignments
16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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, last 30 days — NPA 951
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 |
|---|---|---|---|---|---|---|---|
| 2015-02-13 | 951-425-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-02-13 | 951-425-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-02-13 | 951-472-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MORENO | CA |
| 2015-02-13 | 951-472-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MORENO | CA |
| 2015-02-13 | 951-472-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-02-13 | 951-472-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-02-13 | 951-472-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-02-12 | 951-446-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ARLINGTON | CA |
| 2015-02-12 | 951-446-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ARLINGTON | CA |
| 2015-02-10 | 951-422-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PERRIS | CA |
| 2015-01-19 | 951-523-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CORONA | CA |
| 2015-01-19 | 951-523-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CORONA | CA |
| 2015-01-19 | 951-523-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CORONA | CA |
| 2015-01-12 | 951-456-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MIRA LOMA | CA |
| 2015-01-09 | 951-422-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2015-01-09 | 951-422-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2015-01-08 | 951-523-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-01-06 | 951-399-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | ELSINORE | CA |
| 2014-12-23 | 951-425-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2014-12-23 | 951-425-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2014-12-18 | 951-397-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | MURRIETA | CA |
| 2014-12-18 | 951-426-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | HEMT SNJC | CA |
| 2014-12-15 | 951-446-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2014-12-15 | 951-446-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2014-12-05 | 951-472-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2014-12-03 | 951-397-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | MURRIETA | CA |
| 2014-12-03 | 951-397-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | MURRIETA | CA |
| 2014-11-25 | 951-390-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | HEMT HEMT | CA |
| 2014-11-20 | 951-397-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MURRIETA | CA |
| 2014-11-19 | 951-399-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | ELSINORE | CA |
| 2014-11-19 | 951-426-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | HEMT SNJC | CA |
| 2014-11-11 | 951-840-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA |
| 2014-11-10 | 951-472-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MORENO | CA |
| 2014-11-06 | 951-364-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | HEMT SAGE | CA |
| 2014-11-04 | 951-382-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMSCL CNY | CA |
| 2014-11-04 | 951-386-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WOODCREST | CA |
| 2014-11-04 | 951-426-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT SNJC | CA |
| 2014-11-04 | 951-426-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT SNJC | CA |
| 2014-11-04 | 951-437-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2014-11-04 | 951-437-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2014-11-04 | 951-472-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2014-11-04 | 951-472-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.