NumberResearchRecent thousands-block assignments
0 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, all time — NPA 310
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-10-27 | 310-876-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | CA |
| 2009-10-27 | 310-910-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | INGLEWOOD | CA |
| 2009-10-22 | 310-439-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2009-10-21 | 310-363-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | HAWTHORNE | CA |
| 2009-10-16 | 310-735-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CMTN CMTN | CA |
| 2009-09-24 | 310-438-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN CMTN | CA |
| 2009-09-10 | 310-496-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNMN SNMN | CA |
| 2009-09-04 | 310-363-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2009-09-02 | 310-438-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-09-02 | 310-868-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-09-02 | 310-868-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-09-02 | 310-868-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-08-12 | 310-906-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | EL SEGUNDO | CA |
| 2009-07-30 | 310-742-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-07-30 | 310-742-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-07-30 | 310-742-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-07-30 | 310-742-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-07-30 | 310-742-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-07-28 | 310-363-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HAWTHORNE | CA |
| 2009-07-28 | 310-494-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MALIBU | CA |
| 2009-07-28 | 310-564-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNMN SNMN | CA |
| 2009-07-28 | 310-571-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | W ANGELES | CA |
| 2009-07-28 | 310-571-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | W ANGELES | CA |
| 2009-07-28 | 310-776-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNMN MRVS | CA |
| 2009-07-28 | 310-876-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2009-07-28 | 310-894-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN CMTN | CA |
| 2009-07-28 | 310-906-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | EL SEGUNDO | CA |
| 2009-07-28 | 310-910-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2009-07-28 | 310-929-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | AVALON | CA |
| 2009-07-13 | 310-684-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAN PEDRO | CA |
| 2009-07-06 | 310-310-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNMN SNMN | CA |
| 2009-05-22 | 310-400-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2009-05-21 | 310-272-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | BEVERLYHLS | CA |
| 2009-05-21 | 310-929-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | AVALON | CA |
| 2009-05-18 | 310-400-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CMTN GRDN | CA |
| 2009-03-04 | 310-776-4XXX | 4000–4999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | SNMN MRVS | CA |
| 2009-02-24 | 310-579-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | MALIBU | CA |
| 2009-02-24 | 310-776-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SNMN MRVS | CA |
| 2009-02-20 | 310-461-9XXX | 9000–9999 | Assigned | METROPCS NETWORKS, LLC | 899D | BEVERLYHLS | CA |
| 2009-02-06 | 310-531-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | HAWTHORNE | CA |
| 2009-01-30 | 310-598-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2009-01-30 | 310-598-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2009-01-07 | 310-272-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | BEVERLYHLS | CA |
| 2008-12-17 | 310-619-3XXX | 3000–3999 | Assigned | METROPCS NETWORKS, LLC | 899D | TORRANCE | CA |
| 2008-10-30 | 310-294-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | TORRANCE | CA |
| 2008-09-30 | 310-881-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN MRVS | CA |
| 2008-08-19 | 310-845-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CULVERCITY | CA |
| 2008-08-05 | 310-221-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SAN PEDRO | CA |
| 2008-07-21 | 310-363-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | HAWTHORNE | CA |
| 2008-07-21 | 310-744-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | EL SEGUNDO | 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.