NumberResearchRecent thousands-block assignments
13 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 831
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 |
|---|---|---|---|---|---|---|---|
| 2023-12-06 | 831-249-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BIG SUR | CA |
| 2023-12-06 | 831-259-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2023-12-06 | 831-270-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2023-12-06 | 831-283-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CARMEL VLY | CA |
| 2023-12-06 | 831-299-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TRES PINOS | CA |
| 2023-12-06 | 831-305-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GONZALES | CA |
| 2023-12-06 | 831-330-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CARMEL | CA |
| 2023-12-06 | 831-593-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAN JUAN | CA |
| 2023-12-06 | 831-635-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HOLLISTER | CA |
| 2023-12-06 | 831-705-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHUALAR | CA |
| 2023-12-06 | 831-732-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAN ARDO | CA |
| 2023-12-06 | 831-741-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CASTROVL | CA |
| 2023-12-06 | 831-778-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SAN LUCAS | CA |
| 2023-12-06 | 831-808-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SOLEDAD | CA |
| 2023-12-06 | 831-931-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KING CITY | CA |
| 2023-12-05 | 831-673-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HOLLISTER | CA |
| 2023-12-04 | 831-664-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2023-12-04 | 831-664-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2023-11-15 | 831-259-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | MONTEREY | CA |
| 2023-11-15 | 831-259-2XXX | 2000–2999 | Assigned | NUSO, LLC | 732J | MONTEREY | CA |
| 2023-11-09 | 831-280-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | APTOS | CA |
| 2023-10-23 | 831-855-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MONTEREY | CA |
| 2023-10-02 | 831-203-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-10-02 | 831-203-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-10-02 | 831-203-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-10-02 | 831-260-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SOLEDAD | CA |
| 2023-10-02 | 831-281-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA CRUZ | CA |
| 2023-10-02 | 831-283-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL VLY | CA |
| 2023-10-02 | 831-283-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL VLY | CA |
| 2023-10-02 | 831-388-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | GREENFIELD | CA |
| 2023-10-02 | 831-388-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | GREENFIELD | CA |
| 2023-10-02 | 831-388-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | GREENFIELD | CA |
| 2023-10-02 | 831-656-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-10-02 | 831-718-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-10-02 | 831-830-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | KING CITY | CA |
| 2023-10-02 | 831-833-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | HOLLISTER | CA |
| 2023-10-02 | 831-887-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-09-29 | 831-867-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | MONTEREY | CA |
| 2023-09-29 | 831-867-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | MONTEREY | CA |
| 2023-09-13 | 831-453-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASTROVL | CA |
| 2023-08-29 | 831-284-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WATSONVL | CA |
| 2023-08-16 | 831-279-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALINAS | CA |
| 2023-08-15 | 831-869-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MONTEREY | CA |
| 2023-08-11 | 831-280-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | APTOS | CA |
| 2023-08-11 | 831-280-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | APTOS | CA |
| 2023-08-11 | 831-280-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | APTOS | CA |
| 2023-08-11 | 831-280-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | APTOS | CA |
| 2023-08-11 | 831-280-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | APTOS | CA |
| 2023-08-10 | 831-203-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | SALINAS | CA |
| 2023-07-12 | 831-285-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | 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.