NumberResearchRecent thousands-block assignments
4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2005-08-18 | 510-263-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA |
| 2005-08-18 | 510-263-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA |
| 2005-08-18 | 510-578-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA |
| 2005-08-18 | 510-578-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA |
| 2005-08-18 | 510-637-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD MN-PD | CA |
| 2005-08-18 | 510-637-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD MN-PD | CA |
| 2005-08-18 | 510-686-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | OKLD TRNID | CA |
| 2005-08-18 | 510-686-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD TRNID | CA |
| 2005-08-18 | 510-686-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD TRNID | CA |
| 2005-08-18 | 510-877-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD TRNID | CA |
| 2005-08-18 | 510-877-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD TRNID | CA |
| 2005-08-18 | 510-894-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK MAIN | CA |
| 2005-08-18 | 510-965-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2005-08-18 | 510-965-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RICHMOND | CA |
| 2005-08-17 | 510-227-5XXX | 5000–5999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | OKLD ALMD | CA |
| 2005-08-16 | 510-292-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2005-07-27 | 510-897-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK OLIVR | CA |
| 2005-07-26 | 510-258-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2005-07-22 | 510-417-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2005-07-22 | 510-590-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD MN-PD | CA |
| 2005-07-22 | 510-590-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD MN-PD | CA |
| 2005-07-22 | 510-590-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | OKLD MN-PD | CA |
| 2005-07-21 | 510-292-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2005-07-21 | 510-292-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2005-07-21 | 510-338-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD MN-PD | CA |
| 2005-07-21 | 510-576-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HAYWARD | CA |
| 2005-07-21 | 510-576-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HAYWARD | CA |
| 2005-07-21 | 510-846-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD ALMD | CA |
| 2005-07-18 | 510-280-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2005-07-18 | 510-586-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-586-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-672-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-672-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-672-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-672-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-688-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-688-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-688-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-688-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-688-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-688-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2005-07-18 | 510-837-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-837-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-837-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.