NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 440
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2013-06-11 | 440-805-5XXX | 5000–5999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | ROCK CREEK | OH |
| 2012-06-15 | 440-557-1XXX | 1000–1999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | RUSSELL | OH |
| 2011-09-26 | 440-361-8XXX | 8000–8999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | GENEVA | OH |
| 2011-09-26 | 440-632-7XXX | 7000–7999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | MIDDLEFLD | OH |
| 2011-09-19 | 440-214-3XXX | 3000–3999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | CHARDON | OH |
| 2011-09-19 | 440-261-3XXX | 3000–3999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | ASHTABULA | OH |
| 2011-09-19 | 440-307-3XXX | 3000–3999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | MADISON | OH |
| 2011-09-15 | 440-708-7XXX | 7000–7999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | BAINBRIDGE | OH |
| 2011-07-01 | 440-415-8XXX | 8000–8999 | Assigned | WINDSTREAM WESTERN RESERVE, INC. | 0666 | GENEVA | OH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.