NumberResearchRecent thousands-block assignments
13 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 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 |
|---|---|---|---|---|---|---|---|
| 2023-07-12 | 831-285-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-285-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-285-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-285-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-285-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-285-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2023-07-12 | 831-833-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2023-07-12 | 831-842-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2023-07-12 | 831-842-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2023-07-12 | 831-842-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2023-07-12 | 831-842-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2023-07-12 | 831-842-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2023-07-11 | 831-279-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2023-07-11 | 831-279-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2023-07-11 | 831-279-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2023-07-11 | 831-279-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2023-07-05 | 831-747-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | MONTEREY | CA |
| 2023-06-26 | 831-260-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SOLEDAD | CA |
| 2023-06-26 | 831-279-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-06-26 | 831-279-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-06-26 | 831-279-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-06-26 | 831-282-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-06-26 | 831-282-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-06-26 | 831-306-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CHUALAR | CA |
| 2023-06-26 | 831-388-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | GREENFIELD | CA |
| 2023-06-26 | 831-641-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-06-26 | 831-718-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-06-26 | 831-833-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | HOLLISTER | CA |
| 2023-06-26 | 831-867-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-06-22 | 831-260-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SOLEDAD | CA |
| 2023-06-22 | 831-283-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL VLY | CA |
| 2023-06-22 | 831-593-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SAN JUAN | CA |
| 2023-06-22 | 831-788-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALINAS | CA |
| 2023-06-14 | 831-833-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | HOLLISTER | CA |
| 2023-05-26 | 831-306-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | CHUALAR | CA |
| 2023-05-25 | 831-665-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HOLLISTER | CA |
| 2023-05-15 | 831-266-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SANTA CRUZ | CA |
| 2023-05-15 | 831-285-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WATSONVL | CA |
| 2023-05-15 | 831-324-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | MONTEREY | CA |
| 2023-05-10 | 831-279-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | SALINAS | CA |
| 2023-05-08 | 831-833-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2023-05-05 | 831-275-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2023-04-20 | 831-837-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2023-04-13 | 831-854-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA CRUZ | CA |
| 2023-04-13 | 831-946-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SANTA CRUZ | CA |
| 2023-04-07 | 831-788-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2023-03-27 | 831-612-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | APTOS | CA |
| 2023-03-15 | 831-744-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | GONZALES | CA |
| 2023-03-02 | 831-285-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATSONVL | CA |
| 2023-02-24 | 831-230-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | MONTEREY | 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.