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 408
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-10-03 | 408-335-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOS GATOS | CA |
| 2005-10-03 | 408-335-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOS GATOS | CA |
| 2005-09-23 | 408-201-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MORGANHILL | CA |
| 2005-09-23 | 408-201-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MORGANHILL | CA |
| 2005-09-15 | 408-660-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-09-15 | 408-660-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-09-12 | 408-340-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CAMPBELL | CA |
| 2005-09-12 | 408-540-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | CAMPBELL | CA |
| 2005-09-12 | 408-627-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2005-09-12 | 408-627-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2005-09-12 | 408-786-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2005-09-01 | 408-465-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MORGANHILL | CA |
| 2005-08-31 | 408-318-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2005-08-31 | 408-332-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2005-08-31 | 408-647-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SARATOGA | CA |
| 2005-08-31 | 408-790-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2005-08-31 | 408-844-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2005-08-29 | 408-694-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS SOUTH | CA |
| 2005-08-26 | 408-837-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SAN MARTIN | CA |
| 2005-08-25 | 408-728-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SNJS SOUTH | CA |
| 2005-08-18 | 408-323-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS SOUTH | CA |
| 2005-08-18 | 408-564-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-564-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-564-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-564-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-660-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-660-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2005-08-18 | 408-796-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMPBELL | CA |
| 2005-08-18 | 408-796-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMPBELL | CA |
| 2005-08-18 | 408-796-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CAMPBELL | CA |
| 2005-08-18 | 408-927-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS SOUTH | CA |
| 2005-08-16 | 408-826-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-08-15 | 408-420-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUNNYVALE | CA |
| 2005-08-15 | 408-541-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SUNNYVALE | CA |
| 2005-08-15 | 408-702-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUNNYVALE | CA |
| 2005-08-05 | 408-786-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS NORTH | CA |
| 2005-08-05 | 408-786-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS NORTH | CA |
| 2005-08-05 | 408-786-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS NORTH | CA |
| 2005-08-03 | 408-207-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2005-08-03 | 408-387-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2005-08-03 | 408-565-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS WEST | CA |
| 2005-08-03 | 408-728-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-08-03 | 408-728-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-08-03 | 408-728-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-08-03 | 408-728-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-08-03 | 408-728-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2005-07-27 | 408-341-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2005-07-27 | 408-368-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SUNNYVALE | CA |
| 2005-07-19 | 408-401-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | CA |
| 2005-07-19 | 408-401-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SNJS WEST | 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.