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 |
|---|---|---|---|---|---|---|---|
| 2003-02-24 | 951-543-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RIVERSIDE | CA |
| 2003-02-19 | 951-719-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2003-02-19 | 951-719-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2003-02-19 | 951-719-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2003-02-19 | 951-719-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2003-02-19 | 951-719-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2003-01-22 | 951-834-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2003-01-22 | 951-834-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MURRIETA | CA |
| 2003-01-10 | 951-443-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2003-01-10 | 951-443-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2002-12-19 | 951-471-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ELSINORE | CA |
| 2002-12-19 | 951-894-5XXX | 5000–5999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA |
| 2002-12-18 | 951-571-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MORENO | CA |
| 2002-12-18 | 951-968-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MIRA LOMA | CA |
| 2002-12-16 | 951-271-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | CORONA | CA |
| 2002-12-09 | 951-667-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TEMSCL CNY | CA |
| 2002-12-04 | 951-246-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | SUN CITY | CA |
| 2002-12-04 | 951-413-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2002-11-25 | 951-491-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TEMECULA | CA |
| 2002-11-22 | 951-727-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | MIRA LOMA | CA |
| 2002-11-21 | 951-552-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2002-11-19 | 951-488-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2002-11-19 | 951-488-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2002-11-19 | 951-488-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2002-11-19 | 951-488-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2002-11-14 | 951-566-9XXX | 9000–9999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SUN CITY | CA |
| 2002-11-14 | 951-905-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-13 | 951-894-7XXX | 7000–7999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA |
| 2002-11-08 | 951-231-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-231-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-231-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-275-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-275-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-275-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-275-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-329-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-329-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-368-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-08 | 951-491-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | TEMECULA | CA |
| 2002-11-08 | 951-491-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | TEMECULA | CA |
| 2002-11-08 | 951-786-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | RIVERSIDE | CA |
| 2002-11-07 | 951-552-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2002-11-07 | 951-565-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | WOODCREST | CA |
| 2002-11-07 | 951-704-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | MURRIETA | CA |
| 2002-10-24 | 951-253-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | ELSINORE | CA |
| 2002-10-17 | 951-916-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LAKEVIEWNU | CA |
| 2002-10-07 | 951-436-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | PERRIS | CA |
| 2002-09-27 | 951-436-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | PERRIS | CA |
| 2002-09-18 | 951-304-7XXX | 7000–7999 | Assigned | FRONTIER CALIFORNIA INC. | 2319 | MURRIETA | CA |
| 2002-09-18 | 951-304-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MURRIETA | 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.