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 |
|---|---|---|---|---|---|---|---|
| 2023-01-20 | 831-886-5XXX | 5000–5999 | Assigned | NUSO, LLC | 732J | MONTEREY | CA |
| 2023-01-06 | 831-253-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2022-12-22 | 831-673-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | HOLLISTER | CA |
| 2022-12-15 | 831-747-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2022-12-15 | 831-747-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2022-11-25 | 831-230-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | MONTEREY | CA |
| 2022-11-22 | 831-428-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | SANTA CRUZ | CA |
| 2022-11-22 | 831-830-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | KING CITY | CA |
| 2022-11-17 | 831-266-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SANTA CRUZ | CA |
| 2022-11-15 | 831-230-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2022-11-15 | 831-657-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CA | 649C | MONTEREY | CA |
| 2022-11-15 | 831-788-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2022-11-15 | 831-788-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CA | 649C | SALINAS | CA |
| 2022-11-04 | 831-283-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | CARMEL VLY | CA |
| 2022-11-04 | 831-283-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CARMEL VLY | CA |
| 2022-10-28 | 831-285-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-10-26 | 831-498-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-10-26 | 831-587-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-10-26 | 831-855-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-10-26 | 831-855-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-10-26 | 831-855-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-10-26 | 831-855-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-10-26 | 831-855-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-10-25 | 831-301-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SAN JUAN | CA |
| 2022-10-24 | 831-302-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | SAN LUCAS | CA |
| 2022-10-24 | 831-306-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CHUALAR | CA |
| 2022-10-24 | 831-788-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SALINAS | CA |
| 2022-10-12 | 831-388-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | GREENFIELD | CA |
| 2022-10-05 | 831-628-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TRES PINOS | CA |
| 2022-10-05 | 831-667-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BIG SUR | CA |
| 2022-10-05 | 831-883-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MONTEREY | CA |
| 2022-10-03 | 831-308-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CA | 649C | CARMEL VLY | CA |
| 2022-09-22 | 831-260-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SOLEDAD | CA |
| 2022-09-22 | 831-388-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | GREENFIELD | CA |
| 2022-09-21 | 831-221-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SAN ARDO | CA |
| 2022-09-21 | 831-221-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | SAN ARDO | CA |
| 2022-09-21 | 831-586-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SAN JUAN | CA |
| 2022-09-21 | 831-653-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | SAN LUCAS | CA |
| 2022-09-21 | 831-653-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | SAN LUCAS | CA |
| 2022-09-21 | 831-731-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CASTROVL | CA |
| 2022-09-21 | 831-731-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CASTROVL | CA |
| 2022-09-21 | 831-731-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CASTROVL | CA |
| 2022-09-21 | 831-996-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-21 | 831-996-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | TRES PINOS | CA |
| 2022-09-20 | 831-224-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | 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.