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 |
|---|---|---|---|---|---|---|---|
| 2011-05-05 | 510-999-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2011-05-04 | 510-274-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2011-05-04 | 510-455-9XXX | 9000–9999 | Assigned | AT&T ENTERPRISES, LLC | 516C | CROCKETT | CA |
| 2011-04-28 | 510-255-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2011-04-28 | 510-255-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2011-04-28 | 510-255-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2011-04-28 | 510-255-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2011-04-27 | 510-940-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | HAYWARD | CA |
| 2011-04-26 | 510-239-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-239-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-296-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HRCUL-RODE | CA |
| 2011-04-26 | 510-296-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HRCUL-RODE | CA |
| 2011-04-26 | 510-516-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2011-04-26 | 510-516-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2011-04-26 | 510-516-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2011-04-26 | 510-516-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK MAIN | CA |
| 2011-04-26 | 510-619-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | RICHMOND | CA |
| 2011-04-26 | 510-629-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-629-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-629-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-764-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-952-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK GRNLF | CA |
| 2011-04-26 | 510-972-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | FRNK GRNLF | CA |
| 2011-04-26 | 510-995-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-26 | 510-995-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2011-04-20 | 510-270-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | FRNK OLIVR | CA |
| 2011-04-19 | 510-327-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2011-04-19 | 510-516-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2011-04-19 | 510-722-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | CROCKETT | CA |
| 2011-04-18 | 510-338-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA |
| 2011-04-18 | 510-940-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2011-04-12 | 510-338-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2011-04-12 | 510-463-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2011-04-12 | 510-467-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD FRTVL | CA |
| 2011-04-12 | 510-485-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD FRTVL | CA |
| 2011-04-12 | 510-500-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD FRTVL | CA |
| 2011-04-12 | 510-542-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2011-04-12 | 510-621-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RICHMOND | CA |
| 2011-04-12 | 510-698-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD FRTVL | CA |
| 2011-04-12 | 510-740-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2011-04-12 | 510-788-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2011-04-12 | 510-815-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ELSBR-PINL | CA |
| 2011-04-12 | 510-854-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | ELSBR-PINL | CA |
| 2011-04-12 | 510-859-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2011-04-12 | 510-907-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD MN-PD | CA |
| 2011-04-12 | 510-926-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2011-04-12 | 510-926-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2011-04-12 | 510-957-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD TRNID | CA |
| 2011-04-12 | 510-957-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD TRNID | CA |
| 2011-04-12 | 510-969-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD TRNID | 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.