NumberResearchRecent thousands-block assignments
0 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, all time — NPA 831
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-22 | 831-328-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2025-04-22 | 831-328-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2025-04-22 | 831-328-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2024-10-02 | 831-317-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-10-02 | 831-317-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-10-02 | 831-317-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-10-02 | 831-317-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-10-02 | 831-867-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-07-22 | 831-268-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FELTON | CA |
| 2024-07-22 | 831-289-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BEN LOMOND | CA |
| 2024-07-22 | 831-366-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BOULDERCRK | CA |
| 2024-07-22 | 831-529-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2024-07-22 | 831-536-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATSONVL | CA |
| 2024-07-22 | 831-842-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | APTOS | CA |
| 2024-04-22 | 831-294-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2024-04-22 | 831-294-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SALINAS | CA |
| 2024-04-22 | 831-883-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-04-22 | 831-884-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTEREY | CA |
| 2024-01-03 | 831-281-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2024-01-03 | 831-281-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2024-01-03 | 831-281-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 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 |
| 2023-03-02 | 831-285-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATSONVL | CA |
| 2021-11-15 | 831-304-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GREENFIELD | CA |
| 2021-11-15 | 831-304-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GREENFIELD | CA |
| 2021-11-15 | 831-699-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FELTON | CA |
| 2021-11-15 | 831-699-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FELTON | CA |
| 2021-10-22 | 831-587-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATSONVL | CA |
| 2021-10-22 | 831-587-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WATSONVL | CA |
| 2021-10-19 | 831-946-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2021-10-19 | 831-946-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2021-10-19 | 831-946-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2021-10-19 | 831-946-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2021-10-19 | 831-946-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SANTA CRUZ | CA |
| 2021-10-14 | 831-401-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BEN LOMOND | CA |
| 2021-10-14 | 831-401-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BEN LOMOND | 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.