Area Code 628 California, USA

WhereCall is here to provide you with the most information on the area code 628, located in California, USA. This area code contains 25 prefixes and is not in jeopardy of exceeding the known supply of central office codes during the planning/implementation interval for relief.


NPA Information
Area Code (NPA) 628
Location California, USA
In Jeopardy? No
Is Assigned? Yes
Assignment Date 19 Dec 2013
In Service? No
In Service Date 21 Mar 2015
Parent NPA 415
Overlay Yes
Overlay Complex 415/628
Predominant Timezone(s) UTC-08:00
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