NumberResearchRecent thousands-block assignments
1 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 |
|---|---|---|---|---|---|---|---|
| 2015-06-04 | 510-679-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2015-06-04 | 510-823-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2015-06-04 | 510-945-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK GRNLF | CA |
| 2015-06-01 | 510-623-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRNK OLIVR | CA |
| 2015-05-13 | 510-640-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ELSBR-PINL | CA |
| 2015-05-07 | 510-942-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHMOND | CA |
| 2015-05-04 | 510-361-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | HAYWARD | CA |
| 2015-05-04 | 510-640-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-640-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-640-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-640-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-640-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-640-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2015-05-04 | 510-674-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-05-04 | 510-674-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-04-30 | 510-256-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | CROCKETT | CA |
| 2015-04-29 | 510-850-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | OKLD TRNID | CA |
| 2015-04-29 | 510-850-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | OKLD TRNID | CA |
| 2015-04-29 | 510-850-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | OKLD TRNID | CA |
| 2015-04-29 | 510-850-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | OKLD TRNID | CA |
| 2015-04-29 | 510-934-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-04-29 | 510-934-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-04-29 | 510-942-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-29 | 510-942-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-29 | 510-942-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-14 | 510-624-9XXX | 9000–9999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | FRNK OLIVR | CA |
| 2015-04-14 | 510-779-1XXX | 1000–1999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ELSBR-PINL | CA |
| 2015-04-13 | 510-679-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2015-04-13 | 510-766-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2015-04-13 | 510-850-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-13 | 510-850-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-13 | 510-850-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-13 | 510-850-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-10 | 510-945-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK GRNLF | CA |
| 2015-04-09 | 510-674-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HAYWARD | CA |
| 2015-04-09 | 510-829-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-09 | 510-829-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-09 | 510-934-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-04-09 | 510-934-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-04-09 | 510-934-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-04-09 | 510-942-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2015-04-08 | 510-560-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-08 | 510-753-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-08 | 510-753-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-04-08 | 510-833-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2015-04-03 | 510-907-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | OKLD MN-PD | CA |
| 2015-04-01 | 510-694-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2015-03-26 | 510-766-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2015-03-26 | 510-766-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2015-03-26 | 510-766-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | 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.