Prefix overview
Phone numbers in prefix 503-301
This page covers the 503-301 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
503-301
RATE CENTER
PORTLAND
CARRIER
SPOK, INC.
OR
Prefix range
The prefix 503-301 includes numbers from 5033010000 to 5033019999.
This range is associated with the PORTLAND rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers