Prefix overview
Phone numbers in prefix 503-381
This page covers the 503-381 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
503-381
RATE CENTER
PORTLAND
CARRIER
T-MOBILE USA, INC.
OR
Prefix range
The prefix 503-381 includes numbers from 5033810000 to 5033819999.
This range is associated with the PORTLAND rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers