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 |
|---|---|---|---|---|---|---|---|
| 2003-01-14 | 510-677-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-14 | 510-677-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | HAYWARD | CA |
| 2003-01-13 | 510-258-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2003-01-13 | 510-258-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2002-12-18 | 510-228-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD FRTVL | CA |
| 2002-12-18 | 510-295-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD BKLY | CA |
| 2002-12-18 | 510-400-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | FRNK GRNLF | CA |
| 2002-12-18 | 510-978-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD ALMD | CA |
| 2002-12-13 | 510-439-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2002-11-21 | 510-827-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-827-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-827-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-827-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-827-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-830-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-830-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-830-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-830-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-21 | 510-830-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | OKLD MN-PD | CA |
| 2002-11-08 | 510-295-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2002-11-08 | 510-295-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2002-11-08 | 510-295-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | OKLD BKLY | CA |
| 2002-11-08 | 510-343-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2002-11-07 | 510-449-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2002-11-07 | 510-449-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2002-11-07 | 510-449-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2002-11-05 | 510-544-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD TRNID | CA |
| 2002-10-31 | 510-461-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2002-10-31 | 510-461-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2002-10-31 | 510-461-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2002-10-31 | 510-461-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2002-10-31 | 510-828-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2002-10-31 | 510-828-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2002-10-04 | 510-338-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD MN-PD | CA |
| 2002-10-02 | 510-275-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | ELSBR-PINL | CA |
| 2002-09-17 | 510-256-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CROCKETT | CA |
| 2002-09-17 | 510-260-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | RICHMOND | CA |
| 2002-08-27 | 510-897-7XXX | 7000–7999 | Assigned | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 7718 | FRNK OLIVR | CA |
| 2002-08-15 | 510-240-4XXX | 4000–4999 | Assigned | AT&T - LOCAL | 7421 | FRNK GRNLF | CA |
| 2002-07-23 | 510-550-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD MN-PD | CA |
| 2002-06-28 | 510-248-1XXX | 1000–1999 | Assigned | PACIFIC BELL | 9740 | FRNK MAIN | CA |
| 2002-06-28 | 510-248-2XXX | 2000–2999 | Assigned | PACIFIC BELL | 9740 | FRNK MAIN | CA |
| 2002-06-28 | 510-248-3XXX | 3000–3999 | Assigned | PACIFIC BELL | 9740 | FRNK MAIN | 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.