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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-05-27 | 408-662-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2011-05-26 | 408-478-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2011-05-26 | 408-478-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS SOUTH | CA |
| 2011-05-26 | 408-479-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS NORTH | CA |
| 2011-05-26 | 408-479-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SNJS NORTH | CA |
| 2011-05-26 | 408-680-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | CAMPBELL | CA |
| 2011-05-25 | 408-212-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUNNYVALE | CA |
| 2011-05-25 | 408-455-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LOS GATOS | CA |
| 2011-05-25 | 408-455-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | LOS GATOS | CA |
| 2011-05-25 | 408-461-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-681-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-682-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-686-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-692-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-695-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-825-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MORGANHILL | CA |
| 2011-05-25 | 408-837-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-837-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-25 | 408-837-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN MARTIN | CA |
| 2011-05-24 | 408-755-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SNJS WEST | CA |
| 2011-05-20 | 408-663-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | SUNNYVALE | CA |
| 2011-05-18 | 408-724-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SNJS SOUTH | CA |
| 2011-05-10 | 408-475-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-475-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-10 | 408-900-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | SUNNYVALE | CA |
| 2011-05-06 | 408-389-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS SOUTH | CA |
| 2011-05-06 | 408-663-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUNNYVALE | CA |
| 2011-05-05 | 408-722-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MORGANHILL | CA |
| 2011-05-05 | 408-960-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SNJS SOUTH | CA |
| 2011-05-04 | 408-703-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS WEST | CA |
| 2011-05-04 | 408-837-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SAN MARTIN | CA |
| 2011-05-04 | 408-837-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SAN MARTIN | CA |
| 2011-04-28 | 408-703-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2011-04-28 | 408-703-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2011-04-26 | 408-703-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNJS WEST | CA |
| 2011-04-25 | 408-647-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SARATOGA | CA |
| 2011-04-25 | 408-647-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SARATOGA | CA |
| 2011-04-25 | 408-740-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SARATOGA | CA |
| 2011-04-21 | 408-900-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SUNNYVALE | CA |
| 2011-04-20 | 408-868-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | SARATOGA | CA |
| 2011-04-20 | 408-900-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUNNYVALE | CA |
| 2011-04-20 | 408-900-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUNNYVALE | 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.