NumberResearchRecent thousands-block assignments
35 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, 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 |
|---|---|---|---|---|---|---|---|
| 2015-09-22 | 925-393-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA |
| 2015-09-18 | 925-393-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | WALNUT CRK | CA |
| 2015-09-16 | 925-316-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | MARTINEZ | CA |
| 2015-09-11 | 925-659-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | BSHP RNCH | CA |
| 2015-09-08 | 925-844-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | CLAYTON | CA |
| 2015-09-02 | 925-750-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA |
| 2015-09-02 | 925-750-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA |
| 2015-08-26 | 925-368-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | PLEASANTON | CA |
| 2015-08-25 | 925-393-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA |
| 2015-08-24 | 925-723-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MARTINEZ | CA |
| 2015-08-21 | 925-596-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | PLEASANTON | CA |
| 2015-08-20 | 925-393-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | WALNUT CRK | CA |
| 2015-08-11 | 925-276-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CLAYTON | CA |
| 2015-08-11 | 925-282-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAFAYETTE | CA |
| 2015-08-11 | 925-983-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BSHP RNCH | CA |
| 2015-08-10 | 925-378-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2015-08-10 | 925-393-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2015-07-31 | 925-329-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2015-07-31 | 925-329-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ANTIOCH | CA |
| 2015-07-29 | 925-374-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MARTINEZ | CA |
| 2015-07-27 | 925-667-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | LIVERMORE | CA |
| 2015-07-24 | 925-483-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CONCORD | CA |
| 2015-07-17 | 925-393-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | WALNUT CRK | CA |
| 2015-07-17 | 925-999-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | DUBLN-SNRM | CA |
| 2015-07-16 | 925-592-0XXX | 0000–0999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | MORAGA | CA |
| 2015-07-13 | 925-368-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA |
| 2015-07-13 | 925-406-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DANVILLE | CA |
| 2015-07-07 | 925-962-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | LAFAYETTE | CA |
| 2015-06-18 | 925-388-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MORAGA | CA |
| 2015-06-18 | 925-455-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LIVERMORE | CA |
| 2015-06-17 | 925-725-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DANVILLE | CA |
| 2015-06-17 | 925-856-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DANVILLE | CA |
| 2015-06-16 | 925-393-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | WALNUT CRK | CA |
| 2015-06-08 | 925-448-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | WALNUT CRK | CA |
| 2015-06-05 | 925-967-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DUBLN-SNRM | CA |
| 2015-06-03 | 925-201-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PLEASANTON | CA |
| 2015-06-03 | 925-290-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LIVERMORE | CA |
| 2015-06-03 | 925-597-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PITTSBURG | CA |
| 2015-06-03 | 925-886-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DANVILLE | CA |
| 2015-06-02 | 925-282-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LAFAYETTE | CA |
| 2015-05-21 | 925-378-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | WALNUT CRK | CA |
| 2015-05-19 | 925-528-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ORINDA | CA |
| 2015-05-18 | 925-255-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORINDA | CA |
| 2015-05-18 | 925-255-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ORINDA | CA |
| 2015-05-18 | 925-378-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALNUT CRK | CA |
| 2015-05-18 | 925-378-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALNUT CRK | CA |
| 2015-05-18 | 925-378-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WALNUT CRK | CA |
| 2015-05-18 | 925-385-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | LAFAYETTE | CA |
| 2015-05-18 | 925-420-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ECONTRCOST | CA |
| 2015-05-18 | 925-526-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | PITTSBURG | 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.