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Rialto, CA Area Codes

Rialto, California (population 106,554) uses area codes 909 and 840.

Area code909
Area code840
Time zonePacific
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RialtoSan BernardinoFontanaOntarioRancho CucamongaPomonaChinoUplandChino HillsRedlandsEastvaleHighlandYucaipaRialto
Rialto and nearby cities in area code 909

Carriers with Rialto numbers

39 prefixes are assigned to the Rialto exchange: 15% mobile, 36% VoIP and cable, 49% landline.

CarrierPrefixes
AT&T (Pacific Bell)8
Metropcs Networks5
Bandwidth5
Onvoy (Sinch)4
Lumen (Level 3)4
T-Mobile3
Verizon Wireless2
Twc Ip Enabled Services2

Area codes used in Rialto

Area codePrefixes serving RialtoMain carriers in this code
90934Frontier, T-Mobile, AT&T Mobility
8405T-Mobile, Fractel, Onvoy (Sinch)

Rialto phone number prefixes

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

Nearby cities in area code 909

Questions

What is the area code for Rialto, CA?
Rialto 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 Rialto in?
Rialto is in the Pacific time zone.