Find any 503- phone number in Oregon
The 503 area code is an area code that serves much of northwest Oregon, including the Portland metropolitan area. It covers the counties of Clackamas, Columbia, Hood River, Multnomah, Polk, Washington, and Yamhill. 503 was the first of the original area codes established in the state of Oregon and went into effect in 1995.
The 503 area code is part of the North American Numbering Plan through the Federal Communications Commission which creates area codes and other telecom services throughout the U.S., Canada, and a few Caribbean nations. This system divides each of these countries into geographic regions and assigns three-digit codes to each area. This plan made it easy to route calls from one area to another and is still used today. 503 is just one of these codes, working alongside other area codes from all over the U.S.