Canadial Know Who Called
← Area code 503

503-523 phone numbers

Numbers 503-523-0000 to 503-523-9999 are assigned to Level 3 Communications, LLC in Beaverton, OR. 5 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 503-523