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Sunnyvale, CA Area Codes

Sunnyvale, California (population 156,577) uses area codes 408 and 669.

Area code408
Area code669
Time zonePacific
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Sunnyvale and nearby cities in area code 408

Carriers with Sunnyvale numbers

123 prefixes are assigned to the Sunnyvale exchange: 21% mobile, 29% VoIP and cable, 50% landline.

CarrierPrefixes
AT&T (Pacific Bell)45
T-Mobile13
Verizon Business (MCImetro)11
Lumen (Level 3)9
AT&T Mobility8
Onvoy (Sinch)8
Metropcs6
Verizon Wireless5

Area codes used in Sunnyvale

Area codePrefixes serving SunnyvaleMain carriers in this code
40896AT&T (Pacific Bell), AT&T Mobility, Verizon Wireless
66927Onvoy (Sinch), T-Mobile, Fractel

Sunnyvale phone number prefixes

Numbers starting with these first six digits were originally assigned to the Sunnyvale exchange.

Nearby cities in area code 408

Questions

What is the area code for Sunnyvale, CA?
Sunnyvale uses 2 area codes: 408 and 669. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Sunnyvale in?
Sunnyvale is in the Pacific time zone.