503 Area Code — Portland, OR
Area code 503 serves Portland and 4 other cities in Oregon. Local time follows America/Los_Angeles. It overlays with 971, so 10-digit dialling is required.
- State
- Oregon
- Primary city
- Portland
- Timezone
- America/Los_Angeles
- In service since
- 1947
- Type
- Geographic
- Overlay codes
- 971
Cities Served by 503
The 503 area code covers 5 cities and communities in Oregon.
- Portland
- Salem
- Gresham
- Hillsboro
- Beaverton
About Area Code 503
Area code 503 is a North American Numbering Plan (NANP) area code that has been in service since 1947. It is administered by NANPA on behalf of the FCC and serves the Oregon region anchored on Portland.
503 now shares its territory with an overlay code (971). 10-digit dialling is required for local calls within this region because the same 7-digit number can be assigned under either code.
Mobile numbers in 503 are portable: a person who moved away from Portland may still carry a 503 mobile number on their device. If you receive an unexpected call from a 503 number, run it through the reverse lookup tool above for the most accurate, free identification.
If you live or do business in Oregon, you may also interact with neighbouring or overlay codes (971). See the related codes section below to explore the rest of Oregon.
Other Oregon Area Codes
Continue exploring the Oregon numbering plan.
503 Area Code FAQ
Where is area code 503?
Area code 503 is located in Oregon, primarily serving Portland and surrounding cities including Salem, Gresham, Hillsboro. The region operates on PT (America/Los_Angeles) time.
What state is 503 area code?
503 is a Oregon area code. It was put into service in 1947 and shares its geographic footprint with overlay code 971.
Is 503 a scam area code?
503 is a legitimate North American area code allocated by NANPA to Oregon. Like any geographic area code, scammers sometimes spoof 503 numbers — judge each call by content (urgent demands, unfamiliar transfers) rather than the area code alone. Run the specific number through our reverse lookup if you're unsure.
What time zone does 503 use?
Area code 503 operates on PT (America/Los_Angeles). Numbers in this area code follow standard Oregon time-zone rules including any daylight-saving transitions for that region.
Can I look up a specific 503 phone number?
Yes. Use the reverse lookup widget above to enter a full 503 number. NumLocation returns the line type (mobile, landline, VoIP), carrier, rate-center city, and any public listings tied to the number — free.
What's the difference between 503 and 971?
503 and 971 cover the same Oregon geographic area as overlay codes. Calls between them are local, but you must dial all 10 digits. New phone numbers in this region are assigned from either pool depending on what's available with the carrier at signup.