Prefix overview
Phone numbers in prefix 503-388
This page covers the 503-388 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
503-388
RATE CENTER
PORTLAND
CARRIER
NEW CINGULAR WIRELESS PCS, LLC
OR
Prefix range
The prefix 503-388 includes numbers from 5033880000 to 5033889999.
This range is associated with the PORTLAND rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC.
Numbers in this prefix
20 numbers