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 |
|---|---|---|---|---|---|---|---|
| 2012-10-03 | 310-299-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | BEVERLYHLS | CA |
| 2012-10-03 | 310-299-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | BEVERLYHLS | CA |
| 2012-10-02 | 310-307-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | W ANGELES | CA |
| 2012-09-21 | 310-218-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | TORRANCE | CA |
| 2012-09-21 | 310-935-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2012-09-20 | 310-494-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MALIBU | CA |
| 2012-09-19 | 310-953-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TORRANCE | CA |
| 2012-09-19 | 310-953-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | TORRANCE | CA |
| 2012-08-24 | 310-692-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2012-08-24 | 310-946-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2012-08-24 | 310-957-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2012-08-14 | 310-879-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2012-08-14 | 310-879-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2012-08-13 | 310-299-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2012-08-13 | 310-730-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2012-08-13 | 310-730-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2012-08-13 | 310-730-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2012-08-13 | 310-870-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-13 | 310-870-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-13 | 310-870-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-13 | 310-870-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-13 | 310-870-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-13 | 310-870-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-08-08 | 310-596-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CULVERCITY | CA |
| 2012-06-22 | 310-912-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | INGLEWOOD | CA |
| 2012-06-20 | 310-857-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | SNMN SNMN | CA |
| 2012-06-06 | 310-755-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TORRANCE | CA |
| 2012-06-05 | 310-461-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BEVERLYHLS | CA |
| 2012-05-30 | 310-744-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | EL SEGUNDO | CA |
| 2012-05-25 | 310-912-5XXX | 5000–5999 | Assigned | METROPCS NETWORKS, LLC | 899D | INGLEWOOD | CA |
| 2012-05-23 | 310-912-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | INGLEWOOD | CA |
| 2012-05-23 | 310-945-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CULVERCITY | CA |
| 2012-05-22 | 310-870-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-05-22 | 310-870-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2012-05-10 | 310-492-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | BEVERLYHLS | CA |
| 2012-05-07 | 310-853-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2012-05-07 | 310-912-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | INGLEWOOD | CA |
| 2012-05-07 | 310-912-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | INGLEWOOD | CA |
| 2012-05-07 | 310-997-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LOMITA | CA |
| 2012-05-03 | 310-464-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2012-04-09 | 310-974-9XXX | 9000–9999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | TORRANCE | CA |
| 2012-02-29 | 310-494-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MALIBU | CA |
| 2012-02-03 | 310-904-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2011-12-14 | 310-602-3XXX | 3000–3999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | LOMITA | CA |
| 2011-12-06 | 310-935-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN PEDRO | CA |
| 2011-12-01 | 310-853-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | CULVERCITY | CA |
| 2011-11-30 | 310-507-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SAN PEDRO | CA |
| 2011-11-08 | 310-321-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | EL SEGUNDO | CA |
| 2011-10-28 | 310-912-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | INGLEWOOD | CA |
| 2011-09-16 | 310-912-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | INGLEWOOD | 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.