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 |
|---|---|---|---|---|---|---|---|
| 2003-03-06 | 310-590-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | INGLEWOOD | CA |
| 2003-03-03 | 310-439-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN MRVS | CA |
| 2003-03-03 | 310-461-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2003-03-03 | 310-461-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2003-03-03 | 310-907-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNMN SNMN | CA |
| 2003-02-24 | 310-227-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EL SEGUNDO | CA |
| 2003-02-24 | 310-227-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EL SEGUNDO | CA |
| 2003-02-24 | 310-945-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CULVERCITY | CA |
| 2003-02-07 | 310-819-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-02-07 | 310-819-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-01-16 | 310-602-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LOMITA | CA |
| 2003-01-16 | 310-706-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | HAWTHORNE | CA |
| 2003-01-08 | 310-431-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | INGLEWOOD | CA |
| 2002-12-18 | 310-220-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAWTHORNE | CA |
| 2002-12-18 | 310-421-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | REDONDO | CA |
| 2002-12-18 | 310-626-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOMITA | CA |
| 2002-12-18 | 310-693-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | INGLEWOOD | CA |
| 2002-12-18 | 310-734-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | BEVERLYHLS | CA |
| 2002-12-18 | 310-736-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CULVERCITY | CA |
| 2002-12-18 | 310-878-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CMTN GRDN | CA |
| 2002-12-18 | 310-953-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | TORRANCE | CA |
| 2002-12-16 | 310-593-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN SNMN | CA |
| 2002-12-16 | 310-593-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNMN SNMN | CA |
| 2002-12-12 | 310-218-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-218-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-218-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-218-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-381-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-619-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-634-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-755-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-972-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-972-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-12 | 310-972-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | TORRANCE | CA |
| 2002-12-11 | 310-971-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | SAN PEDRO | CA |
| 2002-11-27 | 310-228-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | 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.