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 |
|---|---|---|---|---|---|---|
| 2004-12-13 | 214-996 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| 2004-10-25 | 214-594 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| 2004-10-25 | 214-602 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | CEDAR HILL | TX |
| 2001-04-24 | 214-247 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | CEDAR HILL | TX |
| — | 214-201 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | GRANDPRARI | TX |
| — | 214-276 | 2XXX3XXX4XXX6XXX8XXX · 2 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-278 | 4XXX6XXX · 2 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | GRANDPRARI | TX |
| — | 214-294 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-313 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-442 | 3XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-445 | 7XXX8XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-451 | 7XXX8XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-545 | 2XXX4XXX7XXX8XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-568 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-569 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-580 | 0XXX4XXX6XXX · 2 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-593 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-627 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-687 | 1XXX2XXX6XXX7XXX8XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| — | 214-768 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-788 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | GRANDPRARI | TX |
| — | 214-873 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-921 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 214-964 | 0XXX which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | 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.