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 |
|---|---|---|---|---|---|---|---|
| 2005-07-18 | 510-837-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-18 | 510-837-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | RICHMOND | CA |
| 2005-07-13 | 510-284-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2005-07-13 | 510-284-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2005-07-13 | 510-894-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2005-07-11 | 510-327-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2005-06-29 | 510-862-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2005-06-29 | 510-862-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2005-06-29 | 510-862-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HAYWARD | CA |
| 2005-06-17 | 510-557-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2005-06-17 | 510-688-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2005-06-17 | 510-688-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2005-06-17 | 510-789-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2005-06-17 | 510-857-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2005-06-08 | 510-343-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | OKLD TRNID | CA |
| 2005-05-31 | 510-557-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2005-05-27 | 510-375-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | RICHMOND | CA |
| 2005-05-22 | 510-672-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | RICHMOND | CA |
| 2005-05-19 | 510-931-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-19 | 510-931-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-19 | 510-931-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-19 | 510-962-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-19 | 510-962-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-19 | 510-962-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | HAYWARD | CA |
| 2005-05-18 | 510-404-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK GRNLF | CA |
| 2005-05-18 | 510-404-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK GRNLF | CA |
| 2005-05-18 | 510-803-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HRCUL-RODE | CA |
| 2005-05-18 | 510-803-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HRCUL-RODE | CA |
| 2005-05-18 | 510-948-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2005-05-18 | 510-948-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HRCUL-RODE | CA |
| 2005-05-18 | 510-948-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | HRCUL-RODE | CA |
| 2005-05-18 | 510-952-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRNK GRNLF | CA |
| 2005-05-18 | 510-952-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | FRNK GRNLF | CA |
| 2005-05-16 | 510-512-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | HAYWARD | CA |
| 2005-05-11 | 510-576-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2005-05-11 | 510-590-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | OKLD MN-PD | CA |
| 2005-05-11 | 510-590-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | OKLD MN-PD | CA |
| 2005-05-11 | 510-943-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2005-05-11 | 510-943-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2005-05-10 | 510-379-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD MN-PD | CA |
| 2005-05-10 | 510-379-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD MN-PD | CA |
| 2005-05-10 | 510-488-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD FRTVL | CA |
| 2005-05-10 | 510-488-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | OKLD FRTVL | CA |
| 2005-05-05 | 510-277-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD BKLY | CA |
| 2005-05-05 | 510-323-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHMOND | CA |
| 2005-05-05 | 510-323-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RICHMOND | CA |
| 2005-05-05 | 510-323-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | RICHMOND | CA |
| 2005-05-05 | 510-373-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OKLD ALMD | CA |
| 2005-05-05 | 510-373-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | CA |
| 2005-05-05 | 510-373-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | OKLD ALMD | 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.