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 |
|---|---|---|---|---|---|---|---|
| 2017-05-16 | 951-484-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | HEMT HEMT | CA |
| 2017-05-15 | 951-418-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | PERRIS | CA |
| 2017-05-15 | 951-783-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | RIVERSIDE | CA |
| 2017-05-11 | 951-383-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | TEMECULA | CA |
| 2017-05-11 | 951-430-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SUN CITY | CA |
| 2017-05-09 | 951-409-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2017-05-09 | 951-409-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2017-04-18 | 951-478-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2017-04-18 | 951-905-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-04-12 | 951-416-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MIRA LOMA | CA |
| 2017-04-12 | 951-418-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | PERRIS | CA |
| 2017-04-12 | 951-484-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HEMT HEMT | CA |
| 2017-04-07 | 951-416-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MIRA LOMA | CA |
| 2017-03-30 | 951-441-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ARLINGTON | CA |
| 2017-03-30 | 951-483-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2017-03-24 | 951-474-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | HEMT SNJC | CA |
| 2017-03-23 | 951-758-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | RIVERSIDE | CA |
| 2017-03-14 | 951-418-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2017-03-14 | 951-418-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2017-03-14 | 951-783-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | RIVERSIDE | CA |
| 2017-03-09 | 951-478-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MORENO | CA |
| 2017-03-03 | 951-783-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2017-02-27 | 951-524-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BANNING | CA |
| 2017-02-17 | 951-410-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | RIVERSIDE | CA |
| 2017-02-14 | 951-418-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2017-02-07 | 951-409-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSINORE | CA |
| 2017-02-07 | 951-417-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | MURRIETA | CA |
| 2017-02-07 | 951-497-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2017-01-31 | 951-441-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | ARLINGTON | CA |
| 2017-01-17 | 951-433-2XXX | 2000–2999 | Assigned | AT&T ENTERPRISES, LLC | 516C | TEMSCL CNY | CA |
| 2017-01-12 | 951-497-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2017-01-10 | 951-418-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2017-01-05 | 951-407-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | CORONA | CA |
| 2017-01-05 | 951-497-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | MORENO | CA |
| 2016-12-19 | 951-783-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RIVERSIDE | CA |
| 2016-12-07 | 951-410-2XXX | 2000–2999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2016-12-07 | 951-410-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2016-12-06 | 951-441-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ARLINGTON | CA |
| 2016-11-30 | 951-429-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WOODCREST | CA |
| 2016-11-29 | 951-414-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | TEMECULA | CA |
| 2016-11-29 | 951-417-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MURRIETA | CA |
| 2016-11-29 | 951-430-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SUN CITY | CA |
| 2016-11-28 | 951-484-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HEMT HEMT | CA |
| 2016-11-28 | 951-497-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2016-11-24 | 951-416-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MIRA LOMA | CA |
| 2016-11-22 | 951-410-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | RIVERSIDE | CA |
| 2016-11-21 | 951-407-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CORONA | CA |
| 2016-11-21 | 951-418-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PERRIS | CA |
| 2016-11-21 | 951-497-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORENO | CA |
| 2016-11-16 | 951-414-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | TEMECULA | 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.