Area codes
United States

List of zones
Communication tower

Colorado

Phone prefixes often called an area code or city code, which is a set of digits forming the most-significant part of the dialing sequence to reach a telephone subscriber. Including how to dial each city using the current dialing system. Sorted by city in alphabetical order for Colorado United States

  • Colorado
    Arvada
    303 + 7 Digits
  • Colorado
    Arvada
    720 + 7 Digits
  • Colorado
    Aurora
    303 + 7 Digits
  • Colorado
    Aurora
    720 + 7 Digits
  • Colorado
    Boulder
    720 + 7 Digits
  • Colorado
    Boulder
    303 + 7 Digits
  • Colorado
    Brighton
    720 + 7 Digits
  • Colorado
    Brighton
    303 + 7 Digits
  • Colorado
    Broomfield
    303 + 7 Digits
  • Colorado
    Broomfield
    720 + 7 Digits
  • Colorado
    Castle Rock
    303 + 7 Digits
  • Colorado
    Castle Rock
    720 + 7 Digits
  • Colorado
    Castlewood
    303 + 7 Digits
  • Colorado
    Castlewood
    720 + 7 Digits
  • Colorado
    Colorado Springs
    719 + 7 Digits
  • Colorado
    Columbine
    303 + 7 Digits
  • Colorado
    Columbine
    720 + 7 Digits
  • Colorado
    Commerce City
    720 + 7 Digits
  • Colorado
    Commerce City
    303 + 7 Digits
  • Colorado
    Denver
    720 + 7 Digits
  • Colorado
    Denver
    303 + 7 Digits
  • Colorado
    Englewood
    720 + 7 Digits
  • Colorado
    Englewood
    303 + 7 Digits
  • Colorado
    Fort Collins
    970 + 7 Digits
  • Colorado
    Grand Junction
    970 + 7 Digits
  • Colorado
    Greeley
    970 + 7 Digits
  • Colorado
    Highlands Ranch
    720 + 7 Digits
  • Colorado
    Highlands Ranch
    303 + 7 Digits
  • Colorado
    Ken Caryl
    720 + 7 Digits
  • Colorado
    Ken Caryl
    303 + 7 Digits
  • Colorado
    Lafayette
    303 + 7 Digits
  • Colorado
    Lafayette
    720 + 7 Digits
  • Colorado
    Lakewood
    303 + 7 Digits
  • Colorado
    Lakewood
    720 + 7 Digits
  • Colorado
    Littleton
    303 + 7 Digits
  • Colorado
    Littleton
    720 + 7 Digits
  • Colorado
    Longmont
    303 + 7 Digits
  • Colorado
    Longmont
    720 + 7 Digits
  • Colorado
    Loveland
    970 + 7 Digits
  • Colorado
    Loveland
    720 + 7 Digits
  • Colorado
    Loveland
    303 + 7 Digits
  • Colorado
    Northglenn
    303 + 7 Digits
  • Colorado
    Northglenn
    720 + 7 Digits
  • Colorado
    Parker
    303 + 7 Digits
  • Colorado
    Parker
    720 + 7 Digits
  • Colorado
    Pueblo West
    719 + 7 Digits
  • Colorado
    Security-Widefield
    719 + 7 Digits
  • Colorado
    Southglenn
    303 + 7 Digits
  • Colorado
    Southglenn
    720 + 7 Digits
  • Colorado
    Thornton
    303 + 7 Digits
  • Colorado
    Thornton
    720 + 7 Digits
  • Colorado
    Westminster
    720 + 7 Digits
  • Colorado
    Westminster
    303 + 7 Digits
  • Colorado
    Wheat Ridge
    720 + 7 Digits
  • Colorado
    Wheat Ridge
    303 + 7 Digits