NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2017-06-01 | 417-519 | 0XXX4XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | VERONA | MO |
| 2017-01-10 | 417-802 | 2XXX4XXX8XXX9XXX · 3 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | STOTTSCITY | MO |
| 2016-07-11 | 417-615 | 9XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | LIBERAL | MO |
| 2015-06-17 | 417-697 | 0XXX4XXX7XXX9XXX · 4 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | PURDY | MO |
| 2011-11-28 | 417-422 | 0–9 XXXall 10 · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| 2011-11-28 | 417-909 | 2XXX4XXX9XXX · 3 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MYRTLE | MO |
| 2001-06-13 | 417-809 | not yet reported which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | STOCKTON | MO |
| — | 417-253 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | POLK | MO |
| — | 417-267 | 1XXX6XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | PLEASAHOPE | MO |
| — | 417-276 | not yet reported which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | STOCKTON | MO |
| — | 417-285 | 8XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | STOTTSCITY | MO |
| — | 417-326 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| — | 417-327 | 0XXX9XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| — | 417-328 | not yet reported which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| — | 417-376 | 0XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MORRISVL | MO |
| — | 417-442 | 2XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | PURDY | MO |
| — | 417-445 | 4XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | HALF WAY | MO |
| — | 417-467 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | PLEASAHOPE | MO |
| — | 417-498 | 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | VERONA | MO |
| — | 417-632 | 1XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | FAIRVIEW | MO |
| — | 417-638 | 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | STARK CITY | MO |
| — | 417-652 | 2XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | WHEATON | MO |
| — | 417-654 | 3XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | FAIR PLAY | MO |
| — | 417-694 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | ALDRICH | MO |
| — | 417-756 | none assigned yet which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MORRISVL | MO |
| — | 417-770 | 8XXX which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| — | 417-777 | not yet reported which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | BOLIVAR | MO |
| — | 417-842 | 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MINDENMINS | MO |
| — | 417-843 | 7XXX8XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | LIBERAL | MO |
| — | 417-938 | 7XXX9XXX · 2 holders which blocks → | WINDSTREAM MISSOURI, INC. | 1885 | MYRTLE | MO |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.