Prefix overview
Phone numbers in prefix 503-478
This page covers the 503-478 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
503-478
RATE CENTER
PORTLAND
CARRIER
QWEST CORPORATION
OR
Prefix range
The prefix 503-478 includes numbers from 5034780000 to 5034789999.
This range is associated with the PORTLAND rate center and was originally assigned to QWEST CORPORATION.
Numbers in this prefix
20 numbers