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 |
|---|---|---|---|---|---|---|
| 2015-07-01 | 409-219 | 0–9 XXXall 10 · 2 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | PINELAND | TX |
| 2015-07-01 | 409-226 | 0–9 XXXall 10 · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | FAIRMOUNT | TX |
| 2015-07-01 | 409-228 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | HEMPHILL | TX |
| 2015-07-01 | 409-230 | 0–9 XXXall 10 · 4 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | COLMESNEIL | TX |
| 2015-07-01 | 409-404 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MILAM | TX |
| 2015-06-10 | 409-215 | 0–9 XXXall 10 · 5 holders which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | NEWTON | TX |
| — | 409-379 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | NEWTON | TX |
| — | 409-397 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BON WIER | TX |
| — | 409-565 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BURKEVILLE | TX |
| — | 409-579 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | FAIRMOUNT | TX |
| — | 409-584 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | PINELAND | TX |
| — | 409-586 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | BRONSON | TX |
| — | 409-625 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | MILAM | TX |
| — | 409-787 | 7XXX which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | HEMPHILL | TX |
| — | 409-837 | not yet reported which blocks → | VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW | 1181 | COLMESNEIL | 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.