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US area code · Oregon

503 area code

Where the 503 area code is, its overlay and how to dial a +1 503 number from anywhere.

CoversPortland, OregonTime zonePacific (PT)TypeOverlay
Quick answer

The 503 area code is in Portland, Oregon, United States (Pacific (PT)). To call from abroad: +1 503 555-0123. It is an overlay, so all 10 digits are dialled.

StateOregon
Main areaPortland
Time zonePacific (PT)
TypeOverlay
10-digit dialingRequired
In service since01-Jan-1947

The 503 area code is a geographic North American Numbering Plan (NANP) code covering Portland, Oregon. It has been in service since 01-Jan-1947 and sits in the Pacific (PT) time zone.

Overlay 503 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

503971

How to dial a 503 number

From abroad+1 503 555-0123
Within the US / Canada1 503 555-0123
Locally (same area)503 555-0123

Cities in the 503 area code

A 503 number is usually in one of these places in Oregon — 7 counties.

AlohaBeaverton WashingtonGresham MultnomahHillsboro WashingtonKeizer MarionLake Oswego ClackamasMcMinnville YamhillMilwaukieOregon City ClackamasPortland Clackamas;Multnomah;WashingtonSalem Marion;PolkTigardTualatin WashingtonWest Linn ClackamasWoodburn Marion

Other Oregon area codes

458541971

Frequently asked questions

Where is the 503 area code?

The 503 area code is in Portland, Oregon, United States (Pacific (PT)).

Is 503 an overlay area code?

Yes. 503 overlays the same region as 971, so callers dial all 10 digits.

Do I have to dial 10 digits for 503?

Yes — dial the area code plus the seven-digit number.

How do I call a 503 number from another country?

Dial your exit code (or +), then 1, then 503, then the number: +1 503 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 503 number does not pinpoint a street or ZIP code.

Number holders in area code 503

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 503, shared by 44 companies. The largest holders:

CompanyPrefixesShare
Qwest Corporation22228%
Ziply Fiber Northwest, LLC Dba Ziply Fiber10914%
New Cingular Wireless PCS, LLC719%
T-Mobile USA, Inc.567%
Cellco Partnership Dba Verizon Wireless547%
Electric Lightwave LLC Dba Allstream516%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 503 numbers

Reports to the FTC, last 30 days
419
Recorded messages or robocalls
59%
Rank among area codes
#238 of 670
Most reported subjects
Other (192)
Calls pretending to be government, businesses, or family and friends (54)
Reducing your debt (credit cards, mortgage, student loans) (40)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 503 — cities & rate centres

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