Prefix overview
Phone numbers in prefix 972-421
This page covers the 972-421 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
972-421
RATE CENTER
DALLAS
CARRIER
LEVEL 3 OF TELECOM OF TEXAS, LLC - TX
TX
Prefix range
The prefix 972-421 includes numbers from 9724210000 to 9724219999.
This range is associated with the DALLAS rate center and was originally assigned to LEVEL 3 OF TELECOM OF TEXAS, LLC - TX.
Numbers in this prefix
20 numbers