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 |
|---|---|---|---|---|---|---|---|
| 2006-09-29 | 951-823-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | RIVERSIDE | CA |
| 2006-09-26 | 951-553-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | TEMECULA | CA |
| 2006-09-21 | 951-823-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERSIDE | CA |
| 2006-09-18 | 951-398-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WOODCREST | CA |
| 2006-09-18 | 951-823-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2006-09-14 | 951-746-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA |
| 2006-09-14 | 951-746-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA |
| 2006-09-12 | 951-807-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2006-09-08 | 951-473-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2006-09-08 | 951-473-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2006-09-08 | 951-547-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CORONA | CA |
| 2006-09-08 | 951-547-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CORONA | CA |
| 2006-09-08 | 951-547-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CORONA | CA |
| 2006-09-05 | 951-473-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MURRIETA | CA |
| 2006-09-05 | 951-473-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MURRIETA | CA |
| 2006-09-05 | 951-729-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ARLINGTON | CA |
| 2006-09-05 | 951-973-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MURRIETA | CA |
| 2006-09-01 | 951-723-1XXX | 1000–1999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | SUN CITY | CA |
| 2006-08-31 | 951-591-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-08-31 | 951-691-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | MURRIETA | CA |
| 2006-08-30 | 951-398-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WOODCREST | CA |
| 2006-08-29 | 951-797-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BANNING | CA |
| 2006-08-28 | 951-547-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CORONA | CA |
| 2006-08-24 | 951-427-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CORONA | CA |
| 2006-08-23 | 951-240-4XXX | 4000–4999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | TEMECULA | CA |
| 2006-08-22 | 951-570-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-08-22 | 951-570-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2006-08-22 | 951-570-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2006-08-22 | 951-570-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2006-08-16 | 951-327-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HEMT SNJC | CA |
| 2006-08-16 | 951-553-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2006-08-16 | 951-553-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2006-08-16 | 951-708-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | HEMT SAGE | CA |
| 2006-08-16 | 951-870-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2006-08-16 | 951-870-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2006-08-16 | 951-870-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2006-08-16 | 951-870-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2006-08-16 | 951-870-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2006-08-15 | 951-389-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HEMT ANZA | CA |
| 2006-08-15 | 951-389-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HEMT ANZA | CA |
| 2006-08-15 | 951-427-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2006-08-15 | 951-427-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2006-08-15 | 951-473-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MURRIETA | CA |
| 2006-08-15 | 951-473-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MURRIETA | CA |
| 2006-08-15 | 951-575-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PERRIS | CA |
| 2006-08-15 | 951-575-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PERRIS | CA |
| 2006-08-15 | 951-599-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | HEMT HMLD | CA |
| 2006-08-15 | 951-599-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HEMT HMLD | CA |
| 2006-08-15 | 951-878-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LAKEVIEWNU | CA |
| 2006-08-15 | 951-878-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LAKEVIEWNU | 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.