NumberResearchRecent thousands-block assignments
35 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, last 30 days — NPA 925
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 |
|---|---|---|---|---|---|---|---|
| 2003-04-02 | 925-226-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | PLEASANTON | CA |
| 2003-01-10 | 925-234-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | ANTIOCH | CA |
| 2003-01-10 | 925-354-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ANTIOCH | CA |
| 2003-01-03 | 925-305-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | CONCORD | CA |
| 2002-12-18 | 925-344-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LIVERMORE | CA |
| 2002-12-18 | 925-392-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ECONTRCOST | CA |
| 2002-12-18 | 925-452-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DUBLN-SNRM | CA |
| 2002-12-18 | 925-478-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA |
| 2002-12-13 | 925-605-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | LIVERMORE | CA |
| 2002-12-09 | 925-813-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | ANTIOCH | CA |
| 2002-12-09 | 925-813-6XXX | 6000–6999 | Assigned | PACIFIC BELL | 9740 | ANTIOCH | CA |
| 2002-12-09 | 925-813-7XXX | 7000–7999 | Assigned | PACIFIC BELL | 9740 | ANTIOCH | CA |
| 2002-11-27 | 925-262-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | WALNUT CRK | CA |
| 2002-11-22 | 925-247-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MORAGA | CA |
| 2002-11-22 | 925-255-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ORINDA | CA |
| 2002-11-22 | 925-297-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LAFAYETTE | CA |
| 2002-11-22 | 925-319-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | SUNOL | CA |
| 2002-11-05 | 925-297-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LAFAYETTE | CA |
| 2002-10-31 | 925-321-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LIVERMORE | CA |
| 2002-10-31 | 925-324-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2002-10-31 | 925-324-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2002-10-31 | 925-324-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2002-10-31 | 925-324-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2002-10-31 | 925-330-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2002-10-31 | 925-330-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2002-10-31 | 925-330-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2002-10-31 | 925-330-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WALNUT CRK | CA |
| 2002-10-31 | 925-813-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ANTIOCH | CA |
| 2002-09-17 | 925-566-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CONCORD | CA |
| 2002-09-17 | 925-566-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CONCORD | CA |
| 2002-08-15 | 925-241-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | DUBLN-SNRM | CA |
| 2002-07-23 | 925-272-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | DANVILLE | CA |
| 2001-11-20 | 925-522-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ANTIOCH | CA |
| 2001-10-02 | 925-273-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | LIVERMORE | 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.