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 |
|---|---|---|---|---|---|---|---|
| 2007-07-02 | 510-314-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2007-07-02 | 510-314-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2007-06-29 | 510-230-4XXX | 4000–4999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | RICHMOND | CA |
| 2007-06-29 | 510-263-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2007-06-22 | 510-584-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-06-22 | 510-584-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-06-19 | 510-417-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | ELSBR-PINL | CA |
| 2007-06-15 | 510-842-8XXX | 8000–8999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OKLD FRTVL | CA |
| 2007-06-14 | 510-230-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2007-06-14 | 510-230-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2007-06-14 | 510-926-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2007-06-13 | 510-473-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA |
| 2007-06-12 | 510-894-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2007-05-11 | 510-296-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HRCUL-RODE | CA |
| 2007-05-08 | 510-809-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2007-05-08 | 510-878-7XXX | 7000–7999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OKLD TRNID | CA |
| 2007-05-04 | 510-280-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD BKLY | CA |
| 2007-04-17 | 510-584-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2007-04-13 | 510-705-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2007-04-10 | 510-227-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2007-04-10 | 510-257-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | FRNK OLIVR | CA |
| 2007-04-10 | 510-269-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | OKLD FRTVL | CA |
| 2007-04-10 | 510-283-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2007-04-10 | 510-350-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | OKLD MN-PD | CA |
| 2007-04-10 | 510-529-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | OKLD BKLY | CA |
| 2007-04-10 | 510-567-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD TRNID | CA |
| 2007-04-10 | 510-619-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2007-04-10 | 510-690-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2007-04-10 | 510-896-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2007-04-10 | 510-972-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2007-04-02 | 510-495-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | OKLD BKLY | CA |
| 2007-03-23 | 510-394-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2007-03-22 | 510-274-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-03-22 | 510-512-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-03-22 | 510-576-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-03-22 | 510-750-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2007-03-21 | 510-221-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2007-03-21 | 510-221-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2007-03-13 | 510-722-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CROCKETT | CA |
| 2007-03-12 | 510-434-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2007-03-08 | 510-809-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2007-03-08 | 510-827-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD MN-PD | CA |
| 2007-02-27 | 510-250-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2007-02-27 | 510-250-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2007-02-27 | 510-318-6XXX | 6000–6999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2007-02-27 | 510-318-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2007-02-23 | 510-894-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRNK MAIN | CA |
| 2007-02-16 | 510-441-4XXX | 4000–4999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | FRNK GRNLF | CA |
| 2007-02-16 | 510-675-8XXX | 8000–8999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | FRNK GRNLF | CA |
| 2007-02-15 | 510-230-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHMOND | 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.