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area code

Biggest city:





Pacific (GMT -8)

Nearby area codes: 

Zip codes



Major Cities:

Concord, Walnut Creek, San Ramon, Pittsburg, Antioch.


Average Income:





Unemployment Rate:

Area code 925 is an essential part of the telephone numbering plan in the United States, specifically in the state of California. Geographical Coverage: Area code 925 serves the eastern part of the San Francisco Bay Area in Northern California. This includes parts of Contra Costa and Alameda counties, covering cities such as Walnut Creek, Concord, Pleasanton, and San Ramon. The area is known for its suburban and semi-rural communities, as well as its proximity to major urban centers like San Francisco and Oakland. Establishment and History: The 925 area code was created in 1998 as a split from the 510 area code. This division was necessary to address the increasing demand for telephone numbers in the region, driven by population growth and the proliferation of cell phones and internet connections. Cultural and Economic Significance: The region served by area code 925 is economically diverse, with a mix of residential areas, business districts, and some agricultural lands. It includes thriving commercial centers and suburban communities that are integral to the broader economy of the San Francisco Bay Area. The area is also known for its scenic beauty, including rolling hills and vineyards, especially in the Livermore Valley. In conclusion, area code 925 represents a vital telecommunication zone in Northern California, particularly in the eastern San Francisco Bay Area. Its establishment and ongoing use reflect the evolving telecommunications needs and the growth of this suburban and business-centric region.
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