NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 408
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-04-13 | 408-228-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS NORTH | CA |
| 2004-04-13 | 408-454-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNJS WEST | CA |
| 2004-04-13 | 408-625-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS WEST | CA |
| 2004-04-09 | 408-355-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LOS GATOS | CA |
| 2004-03-25 | 408-417-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-417-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-551-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-551-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2004-03-25 | 408-717-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS SOUTH | CA |
| 2004-03-22 | 408-851-0XXX | 0000–0999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-1XXX | 1000–1999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-4XXX | 4000–4999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-8XXX | 8000–8999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-22 | 408-851-9XXX | 9000–9999 | Assigned | PACIFIC BELL | 9740 | SNJS WEST | CA |
| 2004-03-19 | 408-603-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2004-03-19 | 408-603-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2004-03-12 | 408-207-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNJS WEST | CA |
| 2004-03-12 | 408-215-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SUNNYVALE | CA |
| 2004-02-25 | 408-207-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2004-02-20 | 408-603-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2004-02-16 | 408-465-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MORGANHILL | CA |
| 2004-02-12 | 408-904-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS NORTH | CA |
| 2004-02-05 | 408-518-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2004-02-05 | 408-518-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2004-02-05 | 408-717-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS SOUTH | CA |
| 2004-02-02 | 408-454-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNJS WEST | CA |
| 2004-01-14 | 408-531-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNJS SOUTH | CA |
| 2004-01-13 | 408-603-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2004-01-12 | 408-518-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNJS NORTH | CA |
| 2003-12-23 | 408-898-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SARATOGA | CA |
| 2003-12-17 | 408-427-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GILROY | CA |
| 2003-12-17 | 408-427-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GILROY | CA |
| 2003-12-17 | 408-624-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS SOUTH | CA |
| 2003-12-17 | 408-624-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS SOUTH | CA |
| 2003-12-17 | 408-750-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2003-12-17 | 408-750-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2003-12-10 | 408-668-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2003-12-10 | 408-668-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2003-11-21 | 408-750-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS NORTH | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.