NumberResearchRecent thousands-block assignments
0 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, all time — NPA 831
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-05-31 | 831-788-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | SALINAS | CA |
| 2021-11-21 | 831-842-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | APTOS | CA |
| 2021-08-23 | 831-587-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | WATSONVL | CA |
| 2021-07-13 | 831-946-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | SANTA CRUZ | CA |
| 2020-12-22 | 831-432-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | BOULDERCRK | CA |
| 2020-12-22 | 831-699-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | FELTON | CA |
| 2020-11-02 | 831-677-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | SOLEDAD | CA |
| 2020-11-02 | 831-855-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | MONTEREY | CA |
| 2020-03-30 | 831-529-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | SANTA CRUZ | CA |
| 2020-03-30 | 831-529-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | SANTA CRUZ | CA |
| 2019-12-02 | 831-356-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | SALINAS | CA |
| 2019-12-02 | 831-356-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | SALINAS | CA |
| 2019-03-20 | 831-348-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | WATSONVL | CA |
| 2019-03-20 | 831-877-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | CARMEL | CA |
| 2019-03-20 | 831-877-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | CARMEL | 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.