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 |
|---|---|---|---|---|---|---|
| 2017-07-07 | 405-704 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | TECUMSEH | OK |
| 2017-07-06 | 405-927 | 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PRAGUE | OK |
| 2016-07-12 | 405-461 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | ASHER | OK |
| 2015-06-19 | 405-477 | 0–9 XXXall 10 · 5 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | MEEKER | OK |
| 2015-06-19 | 405-955 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PURCELL | OK |
| 2015-06-19 | 405-963 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | LINDSAY | OK |
| 2008-12-09 | 405-442 | 0–9 XXXall 10 · 5 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PURCELL | OK |
| — | 405-279 | 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | MEEKER | OK |
| — | 405-288 | 1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | WASHINGTON | OK |
| — | 405-289 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | ST LOUIS | OK |
| — | 405-449 | 0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | WAYNE | OK |
| — | 405-527 | not yet reported which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PURCELL | OK |
| — | 405-567 | 5XXX which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PRAGUE | OK |
| — | 405-598 | 7XXX which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | TECUMSEH | OK |
| — | 405-756 | none assigned yet which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | LINDSAY | OK |
| — | 405-784 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | ASHER | OK |
| — | 405-867 | 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | MAYSVILLE | OK |
| — | 405-932 | not yet reported which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | PADEN | OK |
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.