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 |
|---|---|---|---|---|---|---|
| 2017-10-26 | 806-415 | 7XXX which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | CHANNING | TX |
| 2017-10-26 | 806-501 | 7XXX which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | BOYS RANCH | TX |
| 2017-10-26 | 806-504 | 0XXX7XXX · 2 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | ADRIAN | TX |
| 2017-10-26 | 806-505 | 5XXX7XXX · 2 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | ESTELLINE | TX |
| 2017-10-26 | 806-506 | 0XXX7XXX · 2 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | DODSON | TX |
| 2017-10-26 | 806-519 | 0XXX7XXX · 2 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | LAKEVIEW | TX |
| 2017-10-26 | 806-526 | 7XXX which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | GROOM | TX |
| 2017-10-26 | 806-529 | 3XXX7XXX9XXX · 2 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | WILDORADO | TX |
| 2017-10-26 | 806-563 | 0XXX1XXX6XXX7XXX · 4 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | SUNRAY | TX |
| 2017-01-12 | 806-639 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | AMARILLO | TX |
| 2015-12-17 | 806-606 | 0XXX1XXX6XXX7XXX · 3 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | IDALOU | TX |
| 2015-09-28 | 806-507 | 0–9 XXXall 10 · 6 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | LUBBOCK | 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.