925 Area Code in California, United States

Area code 925 covers the inland eastern portion of the San Francisco Bay Area, including cities such as Walnut Creek, Concord, Pleasanton, and Livermore. It was created in 1998 from a split of the 510 area code to accommodate population growth in the East Bay suburbs. The 925 region is known for its affluent communities, vineyards in Livermore Valley, and access to major business corridors. With strong commuter ties to San Francisco and Silicon Valley, the area blends suburban comfort with economic opportunity. It includes major transportation routes like I-680 and the BART system. Area code 925 is often associated with family-friendly neighborhoods, outdoor recreation, and a high quality of life in the Bay Area.