NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2009-09-10 | 325-272 | 0XXX1XXX2XXX3XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MERKEL | TX |
| 2009-09-09 | 325-269 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CLYDE | TX |
| 2007-02-21 | 325-270 | 1XXX2XXX3XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KINGSLAND | TX |
| 2007-02-01 | 325-422 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | HERMLEIGH | TX |
| 2006-07-27 | 325-231 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MERKEL | TX |
| 2006-07-27 | 325-386 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | CLYDE | TX |
| 2006-07-27 | 325-603 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ABILENE | TX |
| 2005-03-01 | 325-805 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MASON | TX |
| 2003-01-23 | 325-600 | 3XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BROWNWOOD | TX |
| 2002-12-03 | 325-215 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | JUNCTION | TX |
| 2002-12-03 | 325-216 | 3XXX4XXX5XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | LLANO | TX |
| 2002-12-03 | 325-218 | 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | MASON | TX |
| 2002-08-19 | 325-200 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BROWNWOOD | TX |
| 2002-07-16 | 325-716 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SAN ANGELO | TX |
| 2002-07-16 | 325-718 | 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BALLINGER | TX |
| 2002-05-17 | 325-480 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ABILENE | TX |
| 2002-05-13 | 325-515 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SNYDER | TX |
| 2001-12-27 | 325-455 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | ABILENE | TX |
| 2001-10-03 | 325-939 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SAN ANGELO | TX |
| — | 325-284 | 2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | SAN ANGELO | TX |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.