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 |
|---|---|---|---|---|---|---|
| 2023-01-25 | 430-316 | 1XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MIMS | TX |
| 2023-01-25 | 430-317 | 1XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HARLETON | TX |
| 2023-01-25 | 430-319 | 1XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | PRITCHETT | TX |
| 2023-01-25 | 430-320 | 0XXX1XXX2XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BETTIE | TX |
| 2023-01-25 | 430-321 | 1XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ROSEWOOD | TX |
| 2020-04-21 | 430-270 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | WHITESBORO | TX |
| 2014-05-13 | 430-208 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DEKALB | TX |
| 2013-07-29 | 430-203 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BECKVILLE | TX |
| 2007-02-01 | 430-241 | 1XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | DEADWOOD | 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.