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 |
|---|---|---|---|---|---|---|---|
| 2009-11-25 | 510-408-5XXX | 5000–5999 | Assigned | PACIFIC BELL | 9740 | ELSBR-PINL | CA |
| 2009-11-24 | 510-815-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2009-11-23 | 510-574-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRNK MAIN | CA |
| 2009-11-23 | 510-621-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2009-11-23 | 510-698-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | OKLD FRTVL | CA |
| 2009-11-23 | 510-747-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2009-11-23 | 510-899-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | OKLD MN-PD | CA |
| 2009-11-23 | 510-924-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | OKLD TRNID | CA |
| 2009-11-23 | 510-984-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD BKLY | CA |
| 2009-11-19 | 510-296-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2009-11-19 | 510-413-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | FRNK OLIVR | CA |
| 2009-11-19 | 510-431-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2009-11-19 | 510-455-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CROCKETT | CA |
| 2009-11-19 | 510-731-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2009-11-19 | 510-854-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2009-11-19 | 510-936-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2009-11-18 | 510-318-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2009-11-16 | 510-788-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA |
| 2009-11-16 | 510-788-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD MN-PD | CA |
| 2009-11-09 | 510-431-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | FRNK GRNLF | CA |
| 2009-11-04 | 510-574-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2009-10-26 | 510-542-2XXX | 2000–2999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD BKLY | CA |
| 2009-10-23 | 510-240-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | FRNK GRNLF | CA |
| 2009-10-22 | 510-214-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-214-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-214-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-473-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-473-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-473-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-473-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-545-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-545-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-22 | 510-545-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD ALMD | CA |
| 2009-10-21 | 510-342-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2009-10-02 | 510-677-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2009-09-14 | 510-221-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2009-09-14 | 510-221-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHMOND | CA |
| 2009-09-14 | 510-402-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2009-09-11 | 510-931-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2009-09-04 | 510-559-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2009-09-02 | 510-200-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2009-07-30 | 510-200-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2009-07-30 | 510-488-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2009-07-29 | 510-423-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD BKLY | CA |
| 2009-07-29 | 510-779-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2009-07-27 | 510-397-6XXX | 6000–6999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | HAYWARD | CA |
| 2009-07-23 | 510-924-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | OKLD TRNID | CA |
| 2009-07-17 | 510-709-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2009-07-08 | 510-423-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2009-07-08 | 510-423-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | 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.