Prefix overview
Phone numbers in prefix 503-290
This page covers the 503-290 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
503-290
RATE CENTER
PORTLAND
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
OR
Prefix range
The prefix 503-290 includes numbers from 5032900000 to 5032909999.
This range is associated with the PORTLAND rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers