NumberResearchRecent thousands-block assignments
27 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 |
|---|---|---|---|---|---|---|---|
| 2006-05-12 | 951-527-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | IDYLLWILD | CA |
| 2006-05-12 | 951-579-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ELSINORE | CA |
| 2006-05-12 | 951-582-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | CORONA | CA |
| 2006-05-12 | 951-638-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TEMSCL CNY | CA |
| 2006-05-12 | 951-691-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | MURRIETA | CA |
| 2006-05-12 | 951-729-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | ARLINGTON | CA |
| 2006-05-12 | 951-744-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | HEMT ANZA | CA |
| 2006-05-12 | 951-767-6XXX | 6000–6999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | HEMT SAGE | CA |
| 2006-05-12 | 951-824-3XXX | 3000–3999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | RIVERSIDE | CA |
| 2006-05-12 | 951-846-4XXX | 4000–4999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | BANNING | CA |
| 2006-05-12 | 951-928-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | LAKEVIEWNU | CA |
| 2006-05-09 | 951-902-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2006-05-08 | 951-639-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA |
| 2006-05-03 | 951-240-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | TEMECULA | CA |
| 2006-04-21 | 951-240-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2006-04-21 | 951-240-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2006-04-21 | 951-603-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TEMSCL CNY | CA |
| 2006-04-21 | 951-603-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | TEMSCL CNY | CA |
| 2006-04-21 | 951-691-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MURRIETA | CA |
| 2006-04-18 | 951-403-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2006-04-18 | 951-403-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CORONA | CA |
| 2006-04-11 | 951-722-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-04-11 | 951-847-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CORONA | CA |
| 2006-04-05 | 951-790-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MIRA LOMA | CA |
| 2006-03-31 | 951-742-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERSIDE | CA |
| 2006-03-31 | 951-977-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ARLINGTON | CA |
| 2006-03-24 | 951-385-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-03-24 | 951-385-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-03-24 | 951-710-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ARLINGTON | CA |
| 2006-03-24 | 951-972-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TEMECULA | CA |
| 2006-03-24 | 951-972-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | TEMECULA | CA |
| 2006-03-23 | 951-742-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERSIDE | CA |
| 2006-03-15 | 951-973-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | MURRIETA | CA |
| 2006-03-14 | 951-479-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2006-03-13 | 951-246-8XXX | 8000–8999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SUN CITY | CA |
| 2006-03-13 | 951-744-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | HEMT ANZA | CA |
| 2006-03-13 | 951-902-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MORENO | CA |
| 2006-03-13 | 951-902-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MORENO | CA |
| 2006-03-09 | 951-638-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TEMSCL CNY | CA |
| 2006-03-09 | 951-729-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ARLINGTON | CA |
| 2006-03-09 | 951-742-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | RIVERSIDE | CA |
| 2006-03-09 | 951-742-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2006-03-08 | 951-246-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SUN CITY | CA |
| 2006-03-08 | 951-572-1XXX | 1000–1999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BANNING | CA |
| 2006-03-08 | 951-722-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | PERRIS | CA |
| 2006-03-08 | 951-742-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2006-03-08 | 951-824-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | RIVERSIDE | CA |
| 2006-03-08 | 951-824-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | RIVERSIDE | CA |
| 2006-03-08 | 951-973-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | MURRIETA | CA |
| 2006-03-07 | 951-385-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | 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.