Prefix overview
Phone numbers in prefix 806-421
This page covers the 806-421 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
806-421
RATE CENTER
DUMAS
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - TX
TX
Prefix range
The prefix 806-421 includes numbers from 8064210000 to 8064219999.
This range is associated with the DUMAS rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - TX.
Numbers in this prefix
20 numbers