925 Area Code: Cities, Time Zone and Zip Codes
What area code is 925? The area code 925 is in California and it serves Concord, Antioch, Livermore, San Ramin, Pleasanton, Walnut Creek, Pittsburg, Brentwood, Dublin, and some other surrounding cities. The area code 925 was created from area code 510 on May 19, 1997, and was first put to use on March 14, 1998.