World Library  
Flag as Inappropriate
Email this Article

Area code 925

Article Id: WHEBN0004196340
Reproduction Date:

Title: Area code 925  
Author: World Heritage Encyclopedia
Language: English
Subject: List of North American Numbering Plan area codes, Area code 510, Northern California, Area code 707, Contra Costa County, California
Publisher: World Heritage Encyclopedia

Area code 925

Click on an area code in the map to go to the page for that area code. The area code in red is Area Code 925; all others in blue are California area codes.

Area code 925 is a California telephone area code that was split from area code 510 on March 14, 1998. It covers the inland portions of the East Bay counties of Alameda and Contra Costa in Northern California.

It was originally part of the 415 area code, one of the first three area codes created in California in 1947, which originally covered all of central California. In 1991 the 510 area code was created to encompass most of the East Bay. The 925 area code was created March 14, 1998, when the 510 area code was split along the natural border of the East Bay hills. The number was formed by taking 415 and adding 510 which equals 925.

The area code includes southeastern Alameda County (Dublin, Pleasanton, Livermore, Sunol, and unincorporated areas surrounding those communities), and all of Contra Costa County except the western part (El Cerrito to Crockett).


  • Cities in the 925 area code 1
    • Alameda County 1.1
    • Contra Costa County 1.2
  • See also 2
  • External links 3

Cities in the 925 area code

Alameda County

Contra Costa County

See also

External links

  • NANPA Area Code Map of California
  • Report on the 925 area code produced by the California Public Utilities Commission, Telecommunications Division
  • List of exchanges from, 925 Area Code
California area codes: 209, 213, 310/424, 323, 408/669, 415, 442/760, 510, 530, 559, 562, 619, 626, 650, 657/714, 661, 707, 747/818, 805, 831, 858, 909, 916, 925, 949, 951
North: 707, 916
West: 510 area code 925 East: 209
South: 408/669

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.