Sunnyvale, California
Pacific Time Zone (UTC-8) · CA · —
About Area Codes in Sunnyvale, California
Sunnyvale, California is served by 2 area codes: 408, 669. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within Sunnyvale require 10-digit dialing. The city is in the Pacific time zone (UTC-8).
Other cities in area code 408
Frequently Asked Questions
What area code is Sunnyvale, California?
Sunnyvale, California uses area codes 408 and 669.
What time zone is Sunnyvale in?
Sunnyvale is in the Pacific time zone (UTC-8).
Do I need to dial 10 digits when calling Sunnyvale?
Yes, all local calls in Sunnyvale require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 408 created?
Area code 408 was established in 1959 as a geographic split from a larger area code region to serve the growing population.
What cities share area code 408 with Sunnyvale?
Other cities sharing area code 408 with Sunnyvale include Campbell, Cupertino, Gilroy, Los Gatos, Milpitas, among others.
Also called Sunnyvale:
Sunnyvale, CA · Pacific Time Zone