840 Area Code

Area Code 840 Map

Area code 840 generally covers Fontana, Upland, and Chino in the U.S. State of California.

Top cities in area code 840

City Prefixes
Fontana, CA28.6%
Upland, CA28.6%
Chino, CA14.3%
Pomona, CA14.3%
Redlands, CA14.3%

Area code 840 has 7 prefixes

Prefix Primary City Usage
840-200ChinoLandline
840-201FontanaWireless
840-666FontanaLandline
840-777PomonaLandline
840-800UplandLandline
840-888RedlandsLandline
840-999UplandLandline

Statistics for area code 840