Prefix Information
The prefix 531 is part of area code 503 serving Portland, Oregon.
This exchange contains 10,000 possible phone numbers (503-531-0000 through 503-531-9999).
Phone numbers with prefix 531 in area code 503. Location: Portland, Oregon.
The prefix 531 is part of area code 503 serving Portland, Oregon.
This exchange contains 10,000 possible phone numbers (503-531-0000 through 503-531-9999).