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 417
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-06-06 | 417-519-9XXX | 9000–9999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | VERONA | MO |
| 2017-01-11 | 417-802-9XXX | 9000–9999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | STOTTSCITY | MO |
| 2016-07-13 | 417-615-9XXX | 9000–9999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | LIBERAL | MO |
| 2015-06-18 | 417-697-9XXX | 9000–9999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | PURDY | MO |
| 2011-11-29 | 417-422-4XXX | 4000–4999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| 2011-11-29 | 417-909-4XXX | 4000–4999 | Assigned | WINDSTREAM MISSOURI, INC. | 1885 | MYRTLE | MO |
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.