Prefix overview
Phone numbers in prefix 503-420
This page covers the 503-420 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
503-420
RATE CENTER
DALLAS
CARRIER
T-MOBILE USA, INC.
OR
Prefix range
The prefix 503-420 includes numbers from 5034200000 to 5034209999.
This range is associated with the DALLAS rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers