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 |
|---|---|---|---|---|---|---|---|
| 2003-11-13 | 310-303-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-11-13 | 310-303-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-11-13 | 310-303-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-11-13 | 310-303-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-11-13 | 310-465-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-11-11 | 310-242-0XXX | 0000–0999 | Assigned | METROPCS NETWORKS, LLC | 899D | INGLEWOOD | CA |
| 2003-11-04 | 310-819-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-10-17 | 310-740-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN MRVS | CA |
| 2003-10-16 | 310-469-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EL SEGUNDO | CA |
| 2003-10-14 | 310-743-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | INGLEWOOD | CA |
| 2003-10-14 | 310-846-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | INGLEWOOD | CA |
| 2003-10-10 | 310-883-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN SNMN | CA |
| 2003-09-25 | 310-484-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2003-09-25 | 310-484-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2003-09-25 | 310-693-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2003-09-24 | 310-427-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2003-09-24 | 310-427-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2003-09-19 | 310-747-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CMTN CMTN | CA |
| 2003-09-19 | 310-818-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CMTN GRDN | CA |
| 2003-09-19 | 310-974-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | TORRANCE | CA |
| 2003-09-18 | 310-868-5XXX | 5000–5999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CMTN CMTN | CA |
| 2003-09-17 | 310-803-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TORRANCE | CA |
| 2003-09-17 | 310-803-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | TORRANCE | CA |
| 2003-09-11 | 310-924-7XXX | 7000–7999 | Assigned | METROPCS NETWORKS, LLC | 899D | MALIBU | CA |
| 2003-09-11 | 310-924-8XXX | 8000–8999 | Assigned | METROPCS NETWORKS, LLC | 899D | MALIBU | CA |
| 2003-09-09 | 310-492-1XXX | 1000–1999 | Assigned | METROPCS NETWORKS, LLC | 899D | BEVERLYHLS | CA |
| 2003-09-09 | 310-971-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2003-09-04 | 310-346-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-525-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-719-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-767-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-808-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-808-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-818-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-04 | 310-999-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN GRDN | CA |
| 2003-09-02 | 310-357-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TORRANCE | CA |
| 2003-09-02 | 310-755-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TORRANCE | CA |
| 2003-09-02 | 310-803-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | TORRANCE | CA |
| 2003-09-02 | 310-883-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | SNMN SNMN | CA |
| 2003-09-02 | 310-945-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CULVERCITY | CA |
| 2003-08-29 | 310-432-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2003-08-29 | 310-494-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MALIBU | CA |
| 2003-08-29 | 310-579-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MALIBU | CA |
| 2003-08-19 | 310-220-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | HAWTHORNE | CA |
| 2003-08-06 | 310-946-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2003-08-06 | 310-946-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | INGLEWOOD | CA |
| 2003-08-04 | 310-570-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNMN SNMN | CA |
| 2003-08-04 | 310-981-6XXX | 6000–6999 | Assigned | METROPCS NETWORKS, LLC | 899D | INGLEWOOD | CA |
| 2003-08-01 | 310-896-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | CA |
| 2003-08-01 | 310-944-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | REDONDO | 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.