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 |
|---|---|---|---|---|---|---|---|
| 2017-04-17 | 831-593-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | SAN JUAN | CA |
| 2017-04-17 | 831-627-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | SAN ARDO | CA |
| 2017-04-17 | 831-665-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | HOLLISTER | CA |
| 2017-04-17 | 831-674-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | GREENFIELD | CA |
| 2017-04-17 | 831-679-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | CHUALAR | CA |
| 2017-04-17 | 831-821-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | TRES PINOS | CA |
| 2017-04-14 | 831-244-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CA | 649C | BIG SUR | CA |
| 2017-04-14 | 831-453-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | CASTROVL | CA |
| 2017-04-14 | 831-574-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL | CA |
| 2017-04-14 | 831-652-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL VLY | CA |
| 2017-04-06 | 831-273-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2017-04-04 | 831-975-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SALINAS | CA |
| 2017-03-30 | 831-867-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | MONTEREY | CA |
| 2017-03-21 | 831-400-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SANTA CRUZ | CA |
| 2017-03-21 | 831-400-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SANTA CRUZ | CA |
| 2017-03-21 | 831-500-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SALINAS | CA |
| 2017-03-21 | 831-500-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | SALINAS | CA |
| 2017-03-20 | 831-666-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CA | 649C | WATSONVL | CA |
| 2017-03-15 | 831-245-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | HOLLISTER | CA |
| 2017-03-15 | 831-256-2XXX | 2000–2999 | Assigned | COMCAST PHONE OF CALIFORNIA, LLC | 394L | SALINAS | CA |
| 2017-03-15 | 831-276-7XXX | 7000–7999 | Assigned | TELNYX LLC | 073H | SALINAS | CA |
| 2017-03-15 | 831-290-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | GONZALES | CA |
| 2017-03-15 | 831-293-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | CARMEL | CA |
| 2017-03-02 | 831-315-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SOLEDAD | CA |
| 2017-03-02 | 831-386-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | KING CITY | CA |
| 2017-03-02 | 831-393-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | MONTEREY | CA |
| 2017-03-02 | 831-856-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | GREENFIELD | CA |
| 2017-01-18 | 831-643-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MONTEREY | CA |
| 2016-12-16 | 831-230-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | MONTEREY | CA |
| 2016-12-08 | 831-201-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | SANTA CRUZ | CA |
| 2016-11-30 | 831-201-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA CRUZ | CA |
| 2016-11-30 | 831-201-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA CRUZ | CA |
| 2016-11-28 | 831-258-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2016-11-28 | 831-258-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2016-11-15 | 831-703-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | BOULDERCRK | CA |
| 2016-11-10 | 831-275-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MONTEREY | CA |
| 2016-11-10 | 831-353-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | WATSONVL | CA |
| 2016-10-31 | 831-258-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2016-10-31 | 831-258-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2016-10-31 | 831-258-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | SALINAS | CA |
| 2016-10-31 | 831-524-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HOLLISTER | CA |
| 2016-10-11 | 831-257-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2016-10-11 | 831-257-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2016-10-11 | 831-257-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2016-10-11 | 831-257-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | APTOS | CA |
| 2016-10-07 | 831-258-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SALINAS | CA |
| 2016-10-05 | 831-313-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | HOLLISTER | CA |
| 2016-09-28 | 831-322-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | WATSONVL | CA |
| 2016-09-23 | 831-774-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | GONZALES | CA |
| 2016-09-16 | 831-322-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | 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.