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 |
|---|---|---|---|---|---|---|---|
| 2015-04-13 | 951-464-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-04-13 | 951-464-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2015-04-10 | 951-434-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA |
| 2015-04-10 | 951-438-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HEMT HEMT | CA |
| 2015-04-10 | 951-987-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2015-04-10 | 951-987-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2015-04-09 | 951-456-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MIRA LOMA | CA |
| 2015-04-07 | 951-462-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERSIDE | CA |
| 2015-04-07 | 951-708-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | HEMT SAGE | CA |
| 2015-04-06 | 951-388-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HEMT HMLD | CA |
| 2015-04-06 | 951-563-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MORENO | CA |
| 2015-03-24 | 951-772-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-03-24 | 951-772-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-03-12 | 951-428-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TEMECULA | CA |
| 2015-03-12 | 951-447-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MURRIETA | CA |
| 2015-03-11 | 951-446-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA |
| 2015-03-11 | 951-446-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA |
| 2015-03-09 | 951-438-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT HEMT | CA |
| 2015-03-09 | 951-438-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT HEMT | CA |
| 2015-03-09 | 951-448-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2015-03-09 | 951-448-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2015-03-09 | 951-463-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-03-09 | 951-463-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-03-09 | 951-463-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-03-09 | 951-463-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-03-09 | 951-463-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CORONA | CA |
| 2015-03-06 | 951-397-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MURRIETA | CA |
| 2015-03-06 | 951-433-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TEMSCL CNY | CA |
| 2015-03-06 | 951-462-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-03-03 | 951-380-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT HEMT | CA |
| 2015-03-02 | 951-465-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RIVERSIDE | CA |
| 2015-02-18 | 951-446-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-02-18 | 951-446-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-02-18 | 951-446-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-02-18 | 951-446-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2015-02-18 | 951-462-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-02-18 | 951-462-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-02-16 | 951-433-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TEMSCL CNY | CA |
| 2015-02-16 | 951-457-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ELSINORE | CA |
| 2015-02-13 | 951-324-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ARLINGTON | CA |
| 2015-02-13 | 951-384-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2015-02-13 | 951-425-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | 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.