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 |
|---|---|---|---|---|---|---|---|
| 2024-05-31 | 510-775-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD ALMD | CA |
| 2024-05-31 | 510-894-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | FRNK MAIN | CA |
| 2024-05-01 | 510-403-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FRNK OLIVR | CA |
| 2024-04-09 | 510-402-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-04-09 | 510-585-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-04-09 | 510-591-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-04-09 | 510-591-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-04-03 | 510-306-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD ALMD | CA |
| 2024-04-03 | 510-306-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | OKLD ALMD | CA |
| 2024-03-27 | 510-392-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | ELSBR-PINL | CA |
| 2024-03-25 | 510-591-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-03-25 | 510-591-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-03-25 | 510-591-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-03-18 | 510-312-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | CROCKETT | CA |
| 2024-03-05 | 510-392-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-03-05 | 510-392-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-03-05 | 510-392-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-03-05 | 510-591-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-03-05 | 510-591-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-02-20 | 510-591-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2024-02-20 | 510-591-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2024-02-20 | 510-591-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2024-02-07 | 510-391-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-02-07 | 510-391-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-02-07 | 510-391-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | FRNK MAIN | CA |
| 2024-01-29 | 510-391-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-01-29 | 510-391-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-01-29 | 510-391-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FRNK MAIN | CA |
| 2024-01-29 | 510-392-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-01-29 | 510-392-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-01-29 | 510-392-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-01-29 | 510-392-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | ELSBR-PINL | CA |
| 2024-01-23 | 510-927-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | OKLD FRTVL | CA |
| 2024-01-18 | 510-392-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | ELSBR-PINL | CA |
| 2024-01-16 | 510-392-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ELSBR-PINL | CA |
| 2024-01-12 | 510-831-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | RICHMOND | CA |
| 2024-01-04 | 510-546-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2024-01-04 | 510-546-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAYWARD | CA |
| 2023-12-21 | 510-391-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2023-12-21 | 510-391-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2023-12-21 | 510-391-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | CA |
| 2023-12-21 | 510-391-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FRNK MAIN | 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.