NumberResearchRecent thousands-block assignments
4 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 510
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 |
|---|---|---|---|---|---|---|---|
| 2016-08-22 | 510-399-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | FRNK MAIN | CA |
| 2016-08-22 | 510-952-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | FRNK GRNLF | CA |
| 2016-08-17 | 510-626-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD TRNID | CA |
| 2016-08-16 | 510-399-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | FRNK MAIN | CA |
| 2016-08-16 | 510-424-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | OKLD FRTVL | CA |
| 2016-08-16 | 510-462-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | FRNK GRNLF | CA |
| 2016-08-16 | 510-464-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | OKLD MN-PD | CA |
| 2016-08-16 | 510-626-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | OKLD TRNID | CA |
| 2016-08-16 | 510-640-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ELSBR-PINL | CA |
| 2016-08-16 | 510-806-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | RICHMOND | CA |
| 2016-08-16 | 510-901-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | HAYWARD | CA |
| 2016-08-16 | 510-906-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | OKLD ALMD | CA |
| 2016-08-16 | 510-937-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CROCKETT | CA |
| 2016-08-16 | 510-939-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | HRCUL-RODE | CA |
| 2016-08-16 | 510-993-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | OKLD BKLY | CA |
| 2016-08-08 | 510-806-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | RICHMOND | CA |
| 2016-08-08 | 510-901-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2016-08-08 | 510-901-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2016-08-02 | 510-821-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2016-08-02 | 510-821-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2016-08-01 | 510-424-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2016-08-01 | 510-626-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD TRNID | CA |
| 2016-08-01 | 510-901-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HAYWARD | CA |
| 2016-08-01 | 510-901-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HAYWARD | CA |
| 2016-07-28 | 510-906-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2016-07-28 | 510-906-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2016-07-28 | 510-946-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK OLIVR | CA |
| 2016-07-27 | 510-806-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2016-07-27 | 510-806-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2016-07-27 | 510-806-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2016-07-26 | 510-422-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2016-07-26 | 510-993-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2016-07-26 | 510-993-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2016-07-26 | 510-993-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2016-07-25 | 510-399-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2016-07-25 | 510-399-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2016-07-25 | 510-707-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD TRNID | CA |
| 2016-07-25 | 510-993-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2016-07-15 | 510-906-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2016-07-15 | 510-906-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2016-07-15 | 510-949-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2016-07-15 | 510-949-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2016-07-15 | 510-949-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2016-07-15 | 510-963-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2016-07-12 | 510-462-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2016-07-12 | 510-462-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2016-07-12 | 510-462-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2016-07-12 | 510-963-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2016-07-11 | 510-330-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2016-07-06 | 510-422-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | OKLD FRTVL | 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.