Area Code 925 is located in CA.
Cities located in 925 area code are Pleasanton, Pittsburg, Antioch, Concord, Danville, Walnut Creek, Livermore, San Ramon, Fremont, Martinez, Sunol, Moraga, Brentwood, Orinda, Oakland, Clayton, Lafayette, Hayward, Concord, Oakley, Oakland.
Counties located in this area code are Alameda County, Contra Costa County