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 |
|---|---|---|---|---|---|---|
| 2019-09-09 | 430-263 | 1XXX3XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MARQUEZ | TX |
| 2019-09-05 | 430-251 | 2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BOGATA | TX |
| 2019-02-25 | 430-253 | 2XXX6XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | FAIRFIELD | TX |
| 2018-02-27 | 430-238 | 0XXX1XXX2XXX6XXX8XXX9XXX · 6 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | DEPORT | TX |
| 2017-03-27 | 430-239 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | REDWATER | TX |
| 2015-08-26 | 430-219 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | HOOKS | TX |
| 2015-08-17 | 430-217 | 4XXX6XXX9XXX · 3 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | CENTERVL | TX |
| 2015-07-08 | 430-975 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | KARNACK | TX |
| 2015-07-08 | 430-982 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MAUD | TX |
| 2015-07-02 | 430-221 | 1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BUFFALO | TX |
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.