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Area Code Overview
Area code 503 is a geographic telephone area code in Oregon that went into service on January 1, 1947. The geographic regions covered by this area code overlay has a population of approximately 2,106,976.
Overlay and Dialing Rules
- Area Code: 503
- State: Oregon
- Type: General Purpose Code
- In Service Date: January 1, 1947
- Overlay Complex: 503/971
- Local Dialing Plan: This area does require you to dial the area code when calling locally.
Estimated Number of Assigned Phone Numbers in Area Code 503
This area code is tied for 48th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 1st out of 4.
6,572,000
Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 503
Wireless
2,074,000 assigned
31.56%
Wireline and VoIP
3,986,000 assigned
60.65%
Other / Unclassified
512,000 assigned
7.79%
Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 503
Estimated assigned wireless phone numbers: 2,074,000
Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.
AT&T Wireless 791,000 (38.14%)
T-Mobile 675,000 (32.55%)
Verizon Wireless 608,000 (29.32%)
Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 503
Estimated assigned wireline and VoIP phone numbers: 3,986,000
ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 782,000 (19.62%)
Bandwidth 237,000 (5.95%)
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 166,000 (4.16%)
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 162,000 (4.06%)
Comcast Business 135,000 (3.39%)
ASTOUND BROADBAND, LLC - OR 25,000 (0.63%)
ZIPLY FIBER PACIFIC, LLC DBA ZIPLY FIBER 20,000 (0.50%)
CHARTER IP ENABLED SERVICES, LLC 15,000 (0.38%)
TERRA NOVA TELECOM INC. 14,000 (0.35%)
Other / Unclassified Assigned Numbering in Area Code 503
Estimated assigned other or unclassified phone numbers: 512,000
SPOK, INC. 230,000 (44.92%)
CASCADE UTILITIES, INC. 50,000 (9.77%)
CANBY TEL. ASSN. 30,000 (5.86%)
ELTOPIA COMMUNICATIONS LLC - OR 21,000 (4.10%)
MOLALLA TEL. CO. 20,000 (3.91%)
STAYTON COOP. TEL. CO. 20,000 (3.91%)
TELEPORT COMMUNICATIONS AMERICA, LLC - OR 17,000 (3.32%)
BEAVER CREEK COOP. TEL. CO. 10,000 (1.95%)
CLEAR CREEK MUTUAL TEL. CO. 10,000 (1.95%)
COLTON TEL. CO. 10,000 (1.95%)
GERVAIS TEL. CO. 10,000 (1.95%)
MONITOR COOP. TEL. CO. 10,000 (1.95%)
Cities and Towns in Area Code 503
Amity, Oregon Astoria, Oregon Aumsville, Oregon Aurora, Oregon Bay City, Oregon Beaver, Oregon Beavercreek, Oregon Beaverton, Oregon Canby, Oregon Cannon Beach, Oregon Carlton, Oregon Charbonneau, Oregon Clackamas, Oregon Clatskanie, Oregon Cloverdale, Oregon Colton, Oregon Corbett, Oregon Dallas, Oregon Dayton, Oregon Detroit, Oregon Estacada, Oregon Falls City, Oregon Garibaldi, Oregon Gervais, Oregon Grand Ronde, Oregon Gresham, Oregon Jewell, Oregon Knappa, Oregon Lyons, Oregon Mcminnville, Oregon Mill City, Oregon Molalla, Oregon Monitor, Oregon Mount Angel, Oregon Nehalem, Oregon Newberg, Oregon North Plains, Oregon Pacific City, Oregon Portland, Oregon Rainier, Oregon Redland, Oregon Rockaway Beach, Oregon Saint Helens, Oregon Saint Paul, Oregon Salem, Oregon Sandy, Oregon Scappoose, Oregon Scio, Oregon Seaside, Oregon Sheridan, Oregon Sherwood, Oregon Silverton, Oregon Stayton, Oregon Tillamook, Oregon Vernonia, Oregon Warrenton, Oregon Westport, Oregon Willamina, Oregon Woodburn, Oregon Yamhill, Oregon These geographic regions are also served by area code 971.
How These Figures Were Built
These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 503, not live customer counts.
Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.
They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.
Population data and locality matching provided by GeoNames.
Last refreshed: April 15, 2026 6:22 pm