← Area code 503
503-481 phone numbers
Numbers 503-481-0000 to 503-481-9999 are assigned to T-Mobile USA, Inc. in Portland, OR.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.
Numbers 503-481-0000 to 503-481-9999 are assigned to T-Mobile USA, Inc. in Portland, OR.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.