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 |
|---|---|---|---|---|---|---|---|
| 2015-08-10 | 510-634-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2015-08-10 | 510-634-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2015-08-10 | 510-634-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2015-08-10 | 510-766-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2015-08-10 | 510-766-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2015-08-06 | 510-506-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD MN-PD | CA |
| 2015-07-31 | 510-833-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2015-07-31 | 510-833-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2015-07-31 | 510-833-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2015-07-20 | 510-694-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2015-07-20 | 510-694-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2015-07-20 | 510-844-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | OKLD MN-PD | CA |
| 2015-07-17 | 510-907-3XXX | 3000–3999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OKLD MN-PD | CA |
| 2015-07-10 | 510-820-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-10 | 510-820-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-08 | 510-679-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD BKLY | CA |
| 2015-07-08 | 510-850-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2015-07-06 | 510-458-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2015-07-06 | 510-679-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD BKLY | CA |
| 2015-07-06 | 510-679-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD BKLY | CA |
| 2015-07-06 | 510-679-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD BKLY | CA |
| 2015-07-06 | 510-766-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2015-07-01 | 510-679-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OKLD BKLY | CA |
| 2015-06-23 | 510-458-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2015-06-23 | 510-458-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2015-06-23 | 510-674-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-23 | 510-674-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2015-06-22 | 510-696-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-06-22 | 510-696-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | OKLD FRTVL | CA |
| 2015-06-18 | 510-945-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK GRNLF | CA |
| 2015-06-18 | 510-945-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK GRNLF | CA |
| 2015-06-15 | 510-850-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | OKLD TRNID | CA |
| 2015-06-11 | 510-945-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2015-06-11 | 510-946-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK OLIVR | CA |
| 2015-06-09 | 510-937-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CROCKETT | CA |
| 2015-06-04 | 510-679-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | OKLD BKLY | CA |
| 2015-06-04 | 510-679-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | 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.