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Hillsborough, CA Area Code

Hillsborough, California (population 11,206) uses area code 650.

Area code650
Time zonePacific
Local time now…

Hillsborough has no telephone exchange of its own in NANPA records; it is served by the San Mateo exchange about 4.2 km away.

HillsboroughSan MateoDaly CityMountain ViewRedwood CityPalo AltoSouth San FranciscoNewarkSan BrunoPacificaMenlo ParkFoster CityBurlingameHillsborough
Hillsborough and nearby cities in area code 650

Carriers with Hillsborough numbers

126 prefixes are assigned to the San Mateo exchange: 32% mobile, 20% VoIP and cable, 48% landline.

CarrierPrefixes
AT&T (Pacific Bell)49
AT&T Mobility18
T-Mobile15
Onvoy (Sinch)7
Verizon Wireless7
Verizon Business (MCImetro)6
Lumen (Level 3)6
Bandwidth3

Area codes used in Hillsborough

Area codePrefixes serving HillsboroughMain carriers in this code
650126AT&T (Pacific Bell), AT&T Mobility, T-Mobile

Hillsborough phone number prefixes

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

Nearby cities in area code 650

Questions

What is the area code for Hillsborough, CA?
The area code for Hillsborough, California is 650.
What time zone is Hillsborough in?
Hillsborough is in the Pacific time zone.