NumberResearchRecent thousands-block assignments
1 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
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-08-26 | 831-880-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2026-08-20 | 831-203-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-08-20 | 831-203-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-07-16 | 831-468-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2026-07-09 | 831-329-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-06-15 | 831-468-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2026-05-15 | 831-270-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-05-11 | 831-327-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | HOLLISTER | CA |
| 2026-05-07 | 831-887-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2026-04-03 | 831-203-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2026-04-03 | 831-203-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | 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 |
| 2022-09-20 | 831-224-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2022-08-02 | 831-587-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-08-02 | 831-587-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-08-02 | 831-587-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2022-07-27 | 831-788-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2022-07-27 | 831-788-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2022-07-27 | 831-837-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2022-07-27 | 831-837-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2022-07-27 | 831-837-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2019-02-26 | 831-401-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BEN LOMOND | CA |
| 2016-07-20 | 831-583-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2016-07-20 | 831-583-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2016-06-28 | 831-200-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2016-06-28 | 831-200-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | MONTEREY | CA |
| 2016-06-28 | 831-322-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | CA |
| 2016-06-23 | 831-999-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA CRUZ | CA |
| 2016-06-22 | 831-512-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2016-04-12 | 831-318-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | APTOS | CA |
| 2016-04-12 | 831-318-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | APTOS | CA |
| 2016-04-12 | 831-609-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BEN LOMOND | CA |
| 2016-04-11 | 831-610-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BOULDERCRK | CA |
| 2015-10-12 | 831-237-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SOLEDAD | CA |
| 2015-10-12 | 831-708-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | APTOS | CA |
| 2015-09-29 | 831-226-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SANTA CRUZ | CA |
| 2015-09-29 | 831-256-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SALINAS | CA |
| 2015-09-16 | 831-221-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | SAN ARDO | CA |
| 2015-09-16 | 831-232-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHUALAR | CA |
| 2015-09-16 | 831-244-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BIG SUR | CA |
| 2015-09-16 | 831-278-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | BEN LOMOND | CA |
| 2015-06-29 | 831-574-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | CARMEL | CA |
| 2015-06-19 | 831-726-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - CA | 981E | WATSONVL | 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.