NumberResearchRecent thousands-block assignments
16 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, 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 |
|---|---|---|---|---|---|---|---|
| 2017-09-15 | 951-336-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2017-09-15 | 951-419-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2017-09-15 | 951-497-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2017-09-12 | 951-848-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-09-12 | 951-848-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-08-31 | 951-758-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA |
| 2017-08-29 | 951-433-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMSCL CNY | CA |
| 2017-08-17 | 951-336-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | CORONA | CA |
| 2017-08-17 | 951-466-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2017-08-14 | 951-419-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2017-08-14 | 951-550-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2017-08-14 | 951-550-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2017-08-09 | 951-417-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MURRIETA | CA |
| 2017-08-07 | 951-419-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MORENO | CA |
| 2017-08-02 | 951-257-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | IDYLLWILD | CA |
| 2017-08-02 | 951-466-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | TEMECULA | CA |
| 2017-08-02 | 951-744-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | HEMT ANZA | CA |
| 2017-08-02 | 951-981-6XXX | 6000–6999 | Assigned | TELNYX LLC | 073H | LAKEVIEWNU | CA |
| 2017-07-27 | 951-226-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | ELSINORE | CA |
| 2017-07-27 | 951-758-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-07-27 | 951-758-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-07-27 | 951-902-4XXX | 4000–4999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2017-07-26 | 951-474-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | HEMT SNJC | CA |
| 2017-07-19 | 951-336-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2017-07-19 | 951-651-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | HEMT SNJC | CA |
| 2017-07-14 | 951-336-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CORONA | CA |
| 2017-07-07 | 951-429-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WOODCREST | CA |
| 2017-06-30 | 951-336-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | CORONA | CA |
| 2017-06-27 | 951-436-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2017-06-27 | 951-483-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2017-06-15 | 951-439-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | HEMT SAGE | CA |
| 2017-06-09 | 951-524-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BANNING | CA |
| 2017-06-08 | 951-758-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-06-08 | 951-758-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-06-06 | 951-416-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | MIRA LOMA | CA |
| 2017-06-06 | 951-429-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | WOODCREST | CA |
| 2017-06-06 | 951-430-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | SUN CITY | CA |
| 2017-06-06 | 951-433-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | TEMSCL CNY | CA |
| 2017-06-06 | 951-467-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | HEMT HMLD | CA |
| 2017-06-06 | 951-474-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | HEMT SNJC | CA |
| 2017-06-06 | 951-524-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | BANNING | CA |
| 2017-06-06 | 951-579-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | ELSINORE | CA |
| 2017-05-22 | 951-299-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | ARLINGTON | CA |
| 2017-05-22 | 951-417-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MURRIETA | CA |
| 2017-05-22 | 951-418-3XXX | 3000–3999 | Assigned | TELNYX LLC | 073H | PERRIS | CA |
| 2017-05-22 | 951-466-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | TEMECULA | CA |
| 2017-05-22 | 951-484-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | HEMT HEMT | CA |
| 2017-05-18 | 951-406-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | ARLINGTON | CA |
| 2017-05-16 | 951-336-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | CORONA | CA |
| 2017-05-16 | 951-409-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | ELSINORE | CA |
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.