World Library  
Flag as Inappropriate
Email this Article

Area codes 503 and 971

  Area Codes 503 and 971

North American telephone area codes 503 and 971 serve the northwestern region of Oregon, including the Portland, Salem, and Astoria metropolitan areas.


  • History 1
  • Service area 2
  • References 3
  • External links 4


Area code 503 was one of the original area codes created as part of the North American Numbering Plan by AT&T and Bell Laboratories in 1947.[1]

Area code 503 was used for the entire state of Oregon until November 5, 1995, when area code 541 began service. With that change, the northwest, and most heavily populated, corner of the state retained the 503 area code and the rest of the state moved to 541.[2]

On July 1, 1999, area code 971 was added to share the service area, with the exceptions of Clatsop and Tillamook counties.[3] Initially, 10-digit dialing was to become mandatory in that service area on January 30, 2000, but the date was extended until October 1, 2000.[4]

The previously exempted Clatsop and Tillamook counties were added to the 503/971 overlay on April 27, 2008.[5]

Service area

Area codes 503 and 971 include communities in the following counties:


  1. ^
  2. ^
  3. ^
  4. ^
  5. ^

External links

  • NANPA Area Code Map of Oregon
Oregon area codes: 458, 503, 541, 971
North: 360
West: Pacific Ocean area codes 503/971 East: 458/541
South: 458/541
Washington area codes: 206, 253, 360, 425, 509

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.