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Area Code 840 Map and Location

Area code 840 is located in San Bernardino. That is the approximate area that is served by this exchange.

Area Code 840 - Cities, Neighborhoods and Local Features

Chino
Fontana
Pomona
San Bernardino

Claremont
Arrowhead
Redlands

Muscoy
Highland
Calimesa
Rialto

Colton
Ontario
Diamond Bar
Upland

Etiwanda
Mentone
Big Bear City
Crestline

Area code 840 currently contains 125 valid local exchanges. Click an exchange below to get more information about the supported thousands digit of the phone number.s