Area Code 925

What is an Area Code? An area code is a section of a telephone number that denotes the broad area that the phone receiving the call is based in. Area codes were first introduced circa 1947 for operator use only. Area codes are three-digit numbers that represent Numbering Plan Areas (NPAs). The area code for a particular city or region is the series of numbers that you have to dial before someone’s number if you are making a phone call to that place from a different area. Area code 925 serves the state of California.

The table below shows the towns and cities that use area code 925

Acalanes Ridge
Alamo
Alhambra Valley
Antioch
Bay Point
Bethel Island
Blackhawk
Brentwood
Byron
Camino Tassajara

Castle Hill
Clayton
Clyde
Concord
Danville
Diablo
Discovery Bay
Dublin
Knightsen
Lafayette
Livermore
Martinez
Moraga
Mountain View
Norris Canyon
North Gate
Oakley
Orinda
Pacheco
Pittsburg
Pleasant Hill

Pleasanton
Reliez Valley
San Miguel
San Ramon
Saranap
Shell Ridge
Sunol
Vine Hill
Contra Costa Centre
Walnut Creek