About colorado

Area Codes for the Largest Cities in Colorado
Arvada 303/720
Aurora 303/720
Boulder 303/720
Brighton 303/720
Broomfield 720/303
Castle Rock 720/303
Castlewood 720/303
Colorado Springs 719
Columbine 303/720
Commerce City 303/720
Denver 303/720
Englewood 303/720
Fort Collins 970
Grand Junction 970
Greeley 970
Highlands Ranch 303/720
Ken Caryl 720/303
Lafayette 720/303
Lakewood 720/303
Littleton 303/720
Longmont 303/720
Loveland 303/720/970
Northglenn 303/720
Parker 303/720
Pueblo 719
Security-widefield 719
Southglenn 720/303
Thornton 720/303
Westminster 720/303
Wheat Ridge 303/720



colorado area code lists

Call from outside colorado, need to add the American International Code is "1",so International city code of colorado is

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