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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-03-22 | 408-550-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SNJS WEST | CA |
| 2006-03-22 | 408-695-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SAN MARTIN | CA |
| 2006-03-22 | 408-747-2XXX | 2000–2999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SUNNYVALE | CA |
| 2006-03-22 | 408-872-7XXX | 7000–7999 | Assigned | UTILITY TELECOM GROUP, LLC - CA | 9262 | SARATOGA | CA |
| 2006-03-10 | 408-740-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SARATOGA | CA |
| 2006-03-01 | 408-841-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS SOUTH | CA |
| 2006-03-01 | 408-854-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-02-28 | 408-731-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SUNNYVALE | CA |
| 2006-02-27 | 408-677-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS SOUTH | CA |
| 2006-02-27 | 408-677-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | SNJS SOUTH | CA |
| 2006-02-20 | 408-402-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOS GATOS | CA |
| 2006-02-20 | 408-438-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LOS GATOS | CA |
| 2006-02-08 | 408-612-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORGANHILL | CA |
| 2006-02-07 | 408-843-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | GILROY | CA |
| 2006-02-01 | 408-387-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS WEST | CA |
| 2006-01-25 | 408-306-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUNNYVALE | CA |
| 2006-01-25 | 408-368-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUNNYVALE | CA |
| 2006-01-25 | 408-368-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUNNYVALE | CA |
| 2006-01-24 | 408-273-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-801-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNJS NORTH | CA |
| 2006-01-20 | 408-843-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | GILROY | CA |
| 2006-01-20 | 408-843-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | GILROY | CA |
| 2006-01-18 | 408-886-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SNJS WEST | CA |
| 2006-01-13 | 408-355-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LOS GATOS | CA |
| 2006-01-13 | 408-636-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SUNNYVALE | CA |
| 2006-01-12 | 408-332-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-332-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-966-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-966-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-966-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-12 | 408-966-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS WEST | CA |
| 2006-01-09 | 408-825-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | MORGANHILL | CA |
| 2005-12-28 | 408-458-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LOS GATOS | CA |
| 2005-12-14 | 408-731-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SUNNYVALE | CA |
| 2005-12-13 | 408-355-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | LOS GATOS | 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.