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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Apr 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-01-19 | 310-894-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN CMTN | CA |
| 2011-01-19 | 310-987-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN PEDRO | CA |
| 2010-12-10 | 310-853-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2010-10-22 | 310-974-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | TORRANCE | CA |
| 2010-10-19 | 310-974-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | TORRANCE | CA |
| 2010-10-18 | 310-747-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2010-10-18 | 310-894-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2010-10-06 | 310-513-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN PEDRO | CA |
| 2010-10-06 | 310-737-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNMN MRVS | CA |
| 2010-09-16 | 310-957-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2010-09-15 | 310-513-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN PEDRO | CA |
| 2010-08-30 | 310-692-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2010-08-06 | 310-461-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2010-08-04 | 310-513-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SAN PEDRO | CA |
| 2010-07-16 | 310-818-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2010-07-16 | 310-895-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2010-06-28 | 310-343-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | EL SEGUNDO | CA |
| 2010-06-10 | 310-944-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | REDONDO | CA |
| 2010-05-26 | 310-957-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | INGLEWOOD | CA |
| 2010-05-21 | 310-692-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2010-04-05 | 310-956-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2010-03-08 | 310-981-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | INGLEWOOD | CA |
| 2010-03-08 | 310-988-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | INGLEWOOD | CA |
| 2010-03-05 | 310-956-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2010-02-19 | 310-622-1XXX | 1000–1999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | W ANGELES | CA |
| 2010-02-03 | 310-737-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNMN MRVS | CA |
| 2010-02-01 | 310-421-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2010-02-01 | 310-896-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2010-02-01 | 310-896-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2010-01-29 | 310-400-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2010-01-29 | 310-400-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CMTN GRDN | CA |
| 2010-01-29 | 310-431-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2010-01-29 | 310-692-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2010-01-27 | 310-845-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2010-01-27 | 310-916-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CULVERCITY | CA |
| 2010-01-12 | 310-363-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2010-01-12 | 310-363-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2010-01-12 | 310-363-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2009-12-07 | 310-343-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | EL SEGUNDO | CA |
| 2009-12-07 | 310-400-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | CMTN GRDN | CA |
| 2009-12-07 | 310-400-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | CMTN GRDN | CA |
| 2009-12-07 | 310-982-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN PEDRO | CA |
| 2009-12-02 | 310-363-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAWTHORNE | CA |
| 2009-11-04 | 310-894-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | CMTN CMTN | CA |
| 2009-10-30 | 310-438-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CMTN CMTN | CA |
| 2009-10-27 | 310-438-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-438-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-438-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN CMTN | CA |
| 2009-10-27 | 310-756-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CMTN GRDN | CA |
| 2009-10-27 | 310-876-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CULVERCITY | 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.