Area Code: 503

503 Area Code belongs to the state of Oregon. The following cities fall under this area code: Aloha, Beaverton, Gresham, Hillsboro, Keizer, Lake Oswego, Mcminnville, Milwaukie, Oregon City, Portland, Salem, Tigard, Tualatin, West Linn, Woodburn. There have been a total of 28266 Numbers for this area code.