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 |
|---|---|---|---|---|---|---|
| 2015-07-06 | 469-346 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | CARROLLTON | TX |
| 2015-02-03 | 469-344 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | PLANO | TX |
| 2014-06-30 | 469-284 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| 2014-01-27 | 469-706 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| 2013-08-06 | 469-535 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | FRISCO | TX |
| 2013-05-06 | 469-773 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | WAXAHACHIE | TX |
| 2012-03-02 | 469-308 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | LEWISVILLE | TX |
| 2005-09-07 | 469-735 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| — | 469-398 | 2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 469-484 | 4XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 469-499 | 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | TX |
| — | 469-533 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 469-621 | not yet reported which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| — | 469-713 | 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | IRVING | 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.