WHAT YOU NEED TO KNOW
Area code 503 serves the Portland metro area and northwestern Oregon, including Portland, Salem, Gresham, and Hillsboro. Established in 1947 as one of the original NANP codes, it was later split and now shares coverage with overlay code 971. The code covers approximately 2.5 million residents across several counties in northwestern Oregon.
- Population: ~2.5 million residents in the coverage area
- Overlay: Overlay: 971 (introduced in 2000)
- Dialing: 10-digit dialing required
- Source Type: Local geographic code
Geographic Coverage
Area code 503 covers northwestern Oregon, spanning Multnomah, Washington, Clackamas, Marion, Yamhill, and Columbia counties. Major cities include Portland, Salem, Gresham, Hillsboro, Beaverton, Lake Oswego, Tigard, Oregon City, Tualatin, Wilsonville, Newberg, McMinnville, Forest Grove, Sherwood, and St. Helens. The code covers the entire Portland metropolitan statistical area as well as the state capital Salem and surrounding communities in the Willamette Valley.
Population and Business Context
The 503 area encompasses one of the Pacific Northwest's largest markets, anchored by Portland's diverse economy. Key industries include technology, manufacturing, healthcare, retail, and logistics. Portland hosts major employers in semiconductor manufacturing, sportswear, and financial services. Salem, as the state capital, contributes a significant public-sector workforce. The region also supports a robust small-business ecosystem, particularly in food, beverage, and outdoor recreation sectors.
Area Code History
Area code 503 was one of the original 86 North American Numbering Plan codes assigned in 1947, initially covering all of Oregon and parts of Idaho. As the region's population grew, the code was split in 1995, with 541 taking over central, eastern, and southern Oregon. The remaining 503 territory, concentrated in the heavily populated northwestern corner of the state, retained the original code number.
How to Dial
Callers within the 503 service area must dial all 10 digits (area code plus the 7-digit number) for every local call, including calls to other 503 numbers. This requirement applies because 503 overlaps with area code 971, which was introduced in 2000. When dialing from outside Oregon or from a mobile device on a different carrier, dial 1 followed by the full 10-digit number.
Need a 503 Number for Your Portland Metro Business?
Businesses operating in the Portland metro area, Salem, and surrounding communities can establish a local presence with a 503 tracking number through Convirza. Convirza provisions trackable local numbers in any North American area code, letting you maintain a recognizable northwestern Oregon prefix whether your team is centralized or distributed across multiple offices. Every call through your 503 number is automatically scored, recorded, and source-attributed using dynamic number insertion (DNI), so you know exactly which campaigns are driving inbound calls. Calls can be routed to any team member, department, or location in real time, giving you full control over how Portland-area leads reach your business.
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