Prefix overview
Phone numbers in prefix 509-303
This page covers the 509-303 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
509-303
RATE CENTER
PROSSER
CARRIER
T-MOBILE USA, INC.
WA
Prefix range
The prefix 509-303 includes numbers from 5093030000 to 5093039999.
This range is associated with the PROSSER rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers