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 |
|---|---|---|---|---|---|---|
| 2014-10-29 | 832-710 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2013-12-23 | 832-783 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2013-08-14 | 832-639 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | TOMBALL | TX |
| 2013-03-19 | 832-913 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | KATY | TX |
| 2013-02-04 | 832-833 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2012-06-14 | 832-714 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2009-10-19 | 832-522 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | BARKER | TX |
| 2007-12-10 | 832-340 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | DICKINSON | TX |
| 2005-03-23 | 832-313 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | WESTFIELD | TX |
| 2005-03-23 | 832-424 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | LANGHAMCRK | TX |
| 2004-07-26 | 832-310 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HSTNSUBURB | TX |
| — | 832-323 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | CHANNELVW | TX |
| — | 832-334 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | CYPRESS | TX |
| — | 832-442 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SPRING | TX |
| — | 832-539 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | STAFFORD | TX |
| — | 832-575 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | LANGHAMCRK | TX |
| — | 832-632 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | LEAGUECITY | TX |
| — | 832-634 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SATSUMA | TX |
| — | 832-698 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | TOMBALL | TX |
| — | 832-747 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | WESTFIELD | TX |
| — | 832-764 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | SPRING | 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.