The 503 area code is used by SOME cities and towns in these Counties:
Clackamas County | Cities & Towns | ZIP Codes | Features |
Clatsop County | Cities & Towns | ZIP Codes | Features |
Columbia County | Cities & Towns | ZIP Codes | Features |
Linn County | Cities & Towns | ZIP Codes | Features |
Marion County | Cities & Towns | ZIP Codes | Features |
Multnomah County | Cities & Towns | ZIP Codes | Features |
Polk County | Cities & Towns | ZIP Codes | Features |
Tillamook County | Cities & Towns | ZIP Codes | Features |
Washington County | Cities & Towns | ZIP Codes | Features |
Yamhill County | Cities & Towns | ZIP Codes | Features |