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Highgrove, CA Area Codes

Highgrove, California (population 7,164) uses area codes 909 and 840.

Area code909
Area code840
Time zonePacific
Local time now…

Highgrove has no telephone exchange of its own in NANPA records; it is served by the Colton exchange about 5.1 km away.

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Highgrove and nearby cities in area code 909

Carriers with Highgrove numbers

51 prefixes are assigned to the Colton exchange: 16% mobile, 20% VoIP and cable, 65% landline.

CarrierPrefixes
AT&T (Pacific Bell)20
Spok5
AT&T Mobility3
Verizon Wireless3
Lumen (Level 3)3
Verizon Business (MCImetro)2
Bandwidth2
Onvoy (Sinch)2

Area codes used in Highgrove

Area codePrefixes serving HighgroveMain carriers in this code
90945Frontier, T-Mobile, AT&T Mobility
8406T-Mobile, Fractel, Onvoy (Sinch)

Highgrove phone number prefixes

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

Nearby cities in area code 909

Questions

What is the area code for Highgrove, CA?
Highgrove uses 2 area codes: 909 and 840. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
What time zone is Highgrove in?
Highgrove is in the Pacific time zone.