The 503 area code serves northwest Oregon, including the Portland metropolitan area and the state capital of Salem. One of the original area codes assigned in 1947, 503 covers the most populous part of Oregon in the Willamette Valley and shares its footprint with the 971 overlay.
Quick Summary of the 503 Area Code
| Area Code | 503 |
| State | Oregon (OR) |
| Region | Northwest Oregon (Portland Metro & Salem) |
| Major Cities | Portland, Salem, Gresham, Hillsboro, Beaverton, Tigard, Lake Oswego, McMinnville |
| Time Zone | Pacific Time (PT) – PST / PDT |
| Dialing Format | 10-digit dialing required |
Geographic Coverage
The 503 area code covers northwest Oregon, centered on Portland and its suburbs of Gresham, Beaverton, Hillsboro, Tigard, and Lake Oswego, and extending south through the Willamette Valley to the state capital of Salem and the wine-country town of McMinnville. It borders Washington State across the Columbia River and shares its territory with the 971 overlay.
Time Zone
The 503 area code observes Pacific Time (PT). Clocks follow Pacific Standard Time (UTC−8) in winter and shift to Pacific Daylight Time (UTC−7) from mid-March through early November. This region shares the same clock as California and the rest of the West Coast, so a 9:00 AM call from Los Angeles reaches a 503 number at 9:00 AM local time.
Tip: Business hours across the 503 region generally run 9:00 AM to 5:00 PM local time, Monday through Friday.
How to Dial a 503 Number
Because area code 503 operates as part of an overlay, 10-digit dialing is mandatory for every local and long-distance call. You must dial the full 10-digit number (503 + the seven-digit line number) even when calling a neighbor across the street. For international callers, dial your country’s exit code, then +1 (the North American country code), then 503, followed by the seven-digit local number.
Scam Alerts for the 503 Area Code
Like every U.S. area code, 503 has been used by scammers who spoof local numbers to appear trustworthy. Residents in Portland, Salem, Gresham, Hillsboro, Beaverton, Tigard, Lake Oswego, McMinnville should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Callers claiming you owe back taxes and threatening arrest unless you pay immediately. |
| Utility Shut-off | Fake Portland General Electric reps demanding payment to avoid disconnection. |
| Bank Fraud Alerts | Robocalls impersonating your bank about “suspicious activity” to phish account details. |
| Grandparent Scam | A caller posing as a relative in trouble asking for emergency wire transfers. |
If you receive a suspicious call from a 503 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the Oregon Department of Justice Consumer Protection.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (Portland General Electric or Pacific Power) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 503 caller making such a demand is a scammer.
History and Economy of the 503 Region
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Area code 503 is one of the original 86 codes established in 1947, and it once covered all of Oregon before 541 was split off in 1995. As the Portland metro grew, the 971 overlay was added in 2000 across the same territory. The regional economy is anchored by technology – the “Silicon Forest” around Hillsboro is home to Intel’s largest operations – and by the athletic and apparel industry, with Nike headquartered in Beaverton and Columbia Sportswear nearby. Portland is also a major shipping port and healthcare hub led by OHSU, while Salem anchors state government and the Willamette Valley supports a thriving wine and agriculture industry.
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Looking Up a 503 Number
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To identify a 503 caller, use a reverse phone lookup service or search the full 10-digit number online. Many Portland businesses, government offices, and healthcare providers list their 503 numbers publicly, so a quick search often confirms a legitimate caller. For unknown numbers, let the call go to voicemail – genuine callers usually leave a detailed voicemail message, whereas robocallers and automated scam calls almost never bother to do so.
Nearby & Related Area Codes
Oregon is served by four area codes. If you are researching 503, these neighboring and overlay codes are worth knowing:
- 971 – Portland & Salem overlay (same region)
- 541 – Central, Eastern & Southern Oregon
- 458 – Central/Eastern/Southern Oregon overlay
You can also browse our full directory of Oregon area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Oregon:
Frequently Asked Questions
Where is the 503 area code located?
The 503 area code covers northwest Oregon, including Portland, Salem, Gresham, Hillsboro, Beaverton, Tigard, Lake Oswego, and McMinnville.
Do I need to dial 10 digits for 503?
Yes. Because 503 shares an overlay with the 971 area code, you must dial all 10 digits for every local call.
What time zone is the 503 area code in?
The 503 area code is in the Pacific Time Zone (PST/PDT), the same as California.
Is 503 the same area as 971?
Yes. 971 is an overlay of 503, so both codes serve the exact same northwest Oregon region.
Related 503 Guides
- Is a 503 call safe? Read Is area code 503 a scam? Spam & safety guide.
- Local coverage: see the Portland area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.