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 |
|---|---|---|---|---|---|---|---|
| 2015-08-25 | 951-438-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HEMT HEMT | CA |
| 2015-08-24 | 951-397-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MURRIETA | CA |
| 2015-08-21 | 951-262-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HEMT ANZA | CA |
| 2015-08-21 | 951-381-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | BANNING | CA |
| 2015-08-21 | 951-388-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HEMT HMLD | CA |
| 2015-08-21 | 951-399-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | ELSINORE | CA |
| 2015-08-21 | 951-426-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HEMT SNJC | CA |
| 2015-08-21 | 951-426-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT SNJC | CA |
| 2015-08-21 | 951-438-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HEMT HEMT | CA |
| 2015-08-21 | 951-447-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MURRIETA | CA |
| 2015-08-21 | 951-527-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | IDYLLWILD | CA |
| 2015-08-14 | 951-391-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-08-14 | 951-391-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-08-14 | 951-391-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-08-12 | 951-428-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-08-11 | 951-475-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2015-08-06 | 951-462-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERSIDE | CA |
| 2015-07-31 | 951-447-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MURRIETA | CA |
| 2015-07-31 | 951-458-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-07-31 | 951-458-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-07-31 | 951-458-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-07-31 | 951-458-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-07-27 | 951-475-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-07-27 | 951-475-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2015-07-24 | 951-420-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-24 | 951-420-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2015-07-23 | 951-482-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-07-23 | 951-482-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2015-07-23 | 951-482-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2015-07-23 | 951-482-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2015-07-22 | 951-422-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-422-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-423-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-464-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-464-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-464-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-464-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-22 | 951-464-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-07-17 | 951-465-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-07-17 | 951-465-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-07-17 | 951-465-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-07-17 | 951-465-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-07-17 | 951-465-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-07-16 | 951-456-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MIRA LOMA | CA |
| 2015-07-06 | 951-422-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-07-06 | 951-422-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-07-06 | 951-457-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2015-07-06 | 951-457-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2015-06-30 | 951-457-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | ELSINORE | CA |
| 2015-06-18 | 951-438-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | 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.