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 641
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-07-29 | 641-432-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | FORESTCITY | IA |
| 2015-06-29 | 641-599-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | ST ANSGAR | IA |
| 2015-06-29 | 641-659-9XXX | 9000–9999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | GRINNELL | IA |
| 2015-06-15 | 641-223-5XXX | 5000–5999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | OSCEOLA | IA |
| 2012-01-12 | 641-278-4XXX | 4000–4999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | CRESTON | IA |
| 2011-10-04 | 641-278-8XXX | 8000–8999 | Assigned | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | CRESTON | IA |
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.