510 Area Code Cities

Walnut CreekUnion City
SunnyvaleSan Leandro
San JoseSan Francisco
RichmondPleasanton
OaklandLos Angeles
HerculesHayward
FremontEl Sobrante
CrockettBerkeley
AlbanyAlameda


510 Area Code Counties

Santa ClaraSan Francisco
Los AngelesContra Costa
Alameda


510 Area Code Phone Numbers List of Area Code and Exchange Combinations

510799510755510467510722510984