Area Code +1 503
Area code +1 503 is a North American area code used to cover the state of Oregon in the United States. It was one of the original area codes established in the North American Numbering Plan (NANP) in 1947. Area code +1 503 covers the northwestern region of Oregon, including the cities of Portland, Salem, Hillsboro, and Beaverton.
As of 2021, the +1 503 area code is not projected to run out of phone number prefixes, which are the three digits following the area code, until the year 2045. However, due to the rapid growth of population and technology usage, this projection could change in the future.
In addition to the +1 503 area code, Oregon also uses the +1 541 area code to cover the eastern and southern regions of the state. The +1 971 area code was added in 2000 as an overlay to both the +1 503 and +1 541 area codes to provide additional phone number availability in the state.