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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2002-09-17 | 310-872-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SAN PEDRO | CA |
| 2002-09-17 | 310-872-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SAN PEDRO | CA |
| 2002-08-01 | 310-437-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SNMN MRVS | CA |
| 2002-08-01 | 310-483-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TORRANCE | CA |
| 2002-07-24 | 310-237-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | CULVERCITY | CA |
| 2002-07-18 | 310-270-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | BEVERLYHLS | CA |
| 2002-07-10 | 310-695-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2002-07-10 | 310-928-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | CMTN CMTN | CA |
| 2002-06-03 | 310-907-2XXX | 2000–2999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | SNMN SNMN | CA |
| 2002-05-24 | 310-907-1XXX | 1000–1999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | SNMN SNMN | CA |
| 2002-05-23 | 310-626-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | LOMITA | CA |
| 2002-05-06 | 310-752-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN SNMN | CA |
| 2002-04-17 | 310-510-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | AVALON | CA |
| 2002-03-29 | 310-221-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SAN PEDRO | CA |
| 2002-03-21 | 310-531-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | HAWTHORNE | CA |
| 2002-03-15 | 310-602-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | LOMITA | CA |
| 2002-02-15 | 310-622-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | W ANGELES | CA |
| 2002-01-18 | 310-427-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SAN PEDRO | CA |
| 2001-10-10 | 310-943-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | W ANGELES | CA |
| 2001-09-17 | 310-695-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2001-09-07 | 310-494-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | MALIBU | CA |
| 2001-08-08 | 310-421-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | REDONDO | CA |
| 2001-08-07 | 310-303-5XXX | 5000–5999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | REDONDO | CA |
| 2001-08-07 | 310-303-6XXX | 6000–6999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | REDONDO | CA |
| 2001-08-07 | 310-303-7XXX | 7000–7999 | Assigned | PACIFIC BELL (COMPETITIVE) | 7480 | REDONDO | CA |
| 2001-07-04 | 310-945-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CULVERCITY | CA |
| 2001-06-12 | 310-356-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | EL SEGUNDO | CA |
| 2001-06-04 | 310-349-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | HAWTHORNE | CA |
| 2001-06-04 | 310-872-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SAN PEDRO | CA |
| 2001-05-28 | 310-431-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | INGLEWOOD | CA |
| 2001-05-11 | 310-427-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SAN PEDRO | CA |
| 2001-05-11 | 310-531-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAWTHORNE | CA |
| 2001-05-11 | 310-590-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | INGLEWOOD | CA |
| 2001-05-11 | 310-868-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CMTN CMTN | CA |
| 2001-04-09 | 310-401-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNMN SNMN | CA |
| 2001-03-26 | 310-280-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CULVERCITY | CA |
| 2001-03-26 | 310-954-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | W ANGELES | CA |
| 2001-02-26 | 310-695-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | INGLEWOOD | CA |
| 2001-02-26 | 310-695-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | INGLEWOOD | CA |
| 2001-02-19 | 310-765-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | EL SEGUNDO | CA |
| 2001-02-07 | 310-439-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SNMN MRVS | CA |
| 2001-01-25 | 310-862-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN MRVS | CA |
| 2000-12-09 | 310-460-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | SNMN SNMN | CA |
| 2000-12-08 | 310-421-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | REDONDO | CA |
| 2000-12-08 | 310-634-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | TORRANCE | CA |
| 2000-11-16 | 310-455-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNMN SNMN | CA |
| 2000-11-14 | 310-651-9XXX | 9000–9999 | Assigned | PAETEC ITEL, LLC | 829J | BEVERLYHLS | CA |
| 2000-10-04 | 310-300-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BEVERLYHLS | CA |
| 2000-09-07 | 310-218-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TORRANCE | CA |
| 2000-09-07 | 310-909-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | W ANGELES | 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.