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 |
|---|---|---|---|---|---|---|---|
| 2015-06-18 | 951-447-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2015-06-09 | 951-482-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-06-09 | 951-482-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-06-08 | 951-428-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-06-08 | 951-428-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-06-04 | 951-393-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-06-04 | 951-474-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HEMT SNJC | CA |
| 2015-06-04 | 951-987-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-06-03 | 951-388-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| 2015-05-29 | 951-880-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | RIVERSIDE | CA |
| 2015-05-19 | 951-434-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-05-19 | 951-434-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUN CITY | CA |
| 2015-05-18 | 951-381-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BANNING | CA |
| 2015-05-14 | 951-429-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WOODCREST | CA |
| 2015-05-14 | 951-465-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERSIDE | CA |
| 2015-05-13 | 951-772-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | CA |
| 2015-05-07 | 951-772-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-05-07 | 951-772-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-05-07 | 951-772-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-05-07 | 951-772-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-05-07 | 951-772-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-05-05 | 951-387-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MURRIETA | CA |
| 2015-05-05 | 951-387-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MURRIETA | CA |
| 2015-05-05 | 951-390-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HEMT HEMT | CA |
| 2015-05-05 | 951-398-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WOODCREST | CA |
| 2015-05-05 | 951-422-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PERRIS | CA |
| 2015-05-05 | 951-422-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PERRIS | CA |
| 2015-05-05 | 951-428-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMECULA | CA |
| 2015-05-05 | 951-428-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMECULA | CA |
| 2015-05-05 | 951-456-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MIRA LOMA | CA |
| 2015-05-05 | 951-456-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MIRA LOMA | CA |
| 2015-05-05 | 951-901-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WOODCREST | CA |
| 2015-04-29 | 951-987-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-04-29 | 951-987-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-04-29 | 951-987-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-04-28 | 951-456-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MIRA LOMA | CA |
| 2015-04-28 | 951-563-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-04-28 | 951-563-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-04-28 | 951-563-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-04-28 | 951-563-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-04-28 | 951-563-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-04-23 | 951-381-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BANNING | CA |
| 2015-04-22 | 951-987-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CORONA | CA |
| 2015-04-15 | 951-563-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-04-15 | 951-563-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-04-14 | 951-563-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2015-04-13 | 951-428-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TEMECULA | CA |
| 2015-04-13 | 951-464-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-04-13 | 951-464-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-04-13 | 951-464-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | 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.