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 |
|---|---|---|---|---|---|---|---|
| 2016-01-08 | 951-463-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-12-29 | 951-462-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | RIVERSIDE | CA |
| 2015-12-21 | 951-455-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MORENO | CA |
| 2015-12-09 | 951-401-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-12-09 | 951-401-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-12-09 | 951-401-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-12-07 | 951-457-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2015-12-01 | 951-455-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-12-01 | 951-455-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-12-01 | 951-455-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-11-12 | 951-401-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-11-10 | 951-391-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-11-10 | 951-391-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-11-10 | 951-391-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-11-10 | 951-391-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HEMT | CA |
| 2015-11-10 | 951-462-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2015-11-10 | 951-465-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2015-11-10 | 951-465-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2015-10-27 | 951-475-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CORONA | CA |
| 2015-10-19 | 951-420-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-10-19 | 951-420-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-10-19 | 951-420-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-10-19 | 951-420-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2015-10-14 | 951-475-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2015-10-14 | 951-476-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA |
| 2015-09-29 | 951-401-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TEMECULA | CA |
| 2015-09-28 | 951-447-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MURRIETA | CA |
| 2015-09-22 | 951-401-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-09-22 | 951-401-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-09-22 | 951-401-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-09-22 | 951-401-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMECULA | CA |
| 2015-09-21 | 951-467-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| 2015-09-21 | 951-467-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| 2015-09-17 | 951-457-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ELSINORE | CA |
| 2015-09-16 | 951-476-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-09-15 | 951-475-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2015-09-14 | 951-772-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-09-14 | 951-772-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-09-11 | 951-421-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-09-11 | 951-421-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-09-11 | 951-421-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-09-11 | 951-421-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2015-09-09 | 951-391-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HEMT HEMT | CA |
| 2015-09-09 | 951-475-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | CORONA | CA |
| 2015-09-09 | 951-475-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CORONA | CA |
| 2015-09-08 | 951-455-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-09-08 | 951-455-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2015-09-03 | 951-475-1XXX | 1000–1999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CORONA | CA |
| 2015-08-26 | 951-420-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | PERRIS | CA |
| 2015-08-26 | 951-458-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | SUN CITY | 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.