Prefix overview
Phone numbers in prefix 820-203
This page covers the 820-203 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
820-203
RATE CENTER
ATASCADERO
CARRIER
T-MOBILE USA, INC.
CA
Prefix range
The prefix 820-203 includes numbers from 8202030000 to 8202039999.
This range is associated with the ATASCADERO rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers