503 area code
Area code 503 is in Oregon. It covers Portland, Salem, Gresham and 157 other places: 192 ZIP codes in Multnomah, Washington, Clackamas and 7 other counties. Local time there is , Pacific Time. In service since 1947; 971 (2000) overlays it, so a number from there can have either code.
Who calls from a 503 number
NANPA records the carrier each block of 503 numbers is assigned to. Of the 7.8 million 503 numbers assigned, 44% are with local phone companies (Qwest (CenturyLink) and Ziply Fiber); 29% with mobile carriers (AT&T Mobility, T-Mobile and Verizon Wireless); 24% with cable, internet-calling, business and other carriers (Onvoy); 3% with paging companies.
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Qwest (CenturyLink) | Landline | 27% |
| Ziply Fiber | Landline | 12% |
| AT&T Mobility | Mobile | 11% |
| T-Mobile | Mobile | 10% |
| Verizon Wireless | Mobile | 8% |
| Onvoy | Cable, VoIP, other | 4% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 503
The 53 places with a telephone rate centre of their own using 503, largest first. Each links to its ZIP codes.
Nearby places using 503
These places have no rate centre of their own in NANPA's records; the nearest one uses 503. Near an area-code boundary that can be wrong for part of a town.
- Hillsboro
- Tigard
- Aloha
- Lake Oswego
- Keizer
- Oregon City
- Bethany
- Tualatin
- Wilsonville
- West Linn
- Happy Valley
- Forest Grove
- Milwaukie
- Hayesville
- Cedar Mill
- Canby
- Oak Grove
- Four Corners
- Troutdale
- Cornelius
- Oatfield
- Sandy
- Gladstone
- Damascus
- Oak Hills
- Fairview
- Independence
- Bull Mountain
- Rockcreek
- Cedar Hills
- Jennings Lodge
- West Haven-Sylvan
- Garden Home-Whitford
- Raleigh Hills
- West Slope
- Marlene Village
- King City
- Mount Hood Villages
- Wood Village
- Lafayette
- Aumsville
- Metzger
- North Plains
- Hubbard
- Eagle Creek
- Dundee
- Sublimity
- Mulino
- Banks
- Welches
- Columbia City
- Durham
- Gearhart
- Dunthorpe
- Boring
- Warren
- Stafford
- Hammond
- Donald
- Bayside Gardens
ZIP codes in area code 503
192 ZIP codes in 107 towns, by the town each is mailed to, largest first. Each links to its own page.
- Portland
- 97201, 97202, 97203, 97204, 97205, 97206, 97207, 97208, 97209, 97210, 97211, 97212, 97213, 97214, 97215, 97216, 97217, 97218, 97219, 97220, 97221, 97222, 97223, 97224, 97225, 97227, 97228, 97229, 97230, 97231, 97232, 97233, 97236, 97238, 97239, 97240, 97242, 97250, 97251, 97252, 97253, 97254, 97256, 97258, 97266, 97267, 97268, 97269, 97280, 97281, 97282, 97283, 97286, 97290, 97291, 97292, 97293, 97294, 97296, 97298
Where 503 numbers are issued
NANPA's rate centres with the most 503 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
PORTLAND | Portland | 347 |
BEAVERTON | Beaverton | 107 |
SALEM | Salem | 73 |
CLACKAMAS | Clackamas | 49 |
STFRD-SNDY | — | 28 |
GRESHAM | Gresham | 22 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Multnomah County (55)
- Washington County (31)
- Clackamas County (27)
- Marion County (31)
- Yamhill County (11)
- Polk County (5)
- Columbia County (8)
- Clatsop County (7)
- Tillamook County (14)
- Linn County (3)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 503
Where is area code 503?
Area code 503 is in Oregon. It covers Portland, Salem, Gresham and 157 other places: 192 ZIP codes in Multnomah, Washington, Clackamas and 7 other counties.
What ZIP codes are in area code 503?
192 ZIP codes, by the town each is mailed to: Portland (60, 97201 to 97298), Salem (14, 97301 to 97317), Gresham (2, 97030 to 97080), Hillsboro (3, 97123 to 97129) and 103 more towns. The full list is on this page.
What time zone is area code 503 in?
Pacific time.
Is a 503 number a mobile or a landline?
It can be either. 29% of 503 numbers are assigned to mobile carriers and 44% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
What area codes overlay 503?
971. They cover the same area as 503, so a new number there can be given any of them.
Does a 503 number mean the caller is in Oregon?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 503 call can come from anywhere.
Other area codes in Oregon
All 4 Oregon area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 503.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/503
Underlying data is public domain or openly licensed — sources, vintages and licences.