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Colorado Area Codes: List, Map, and Phone Lookup

There are 4 active area codes in the state of Colorado. Each of these area codes are listed below. There are two lists that Wirefly provides for the area codes in Colorado. The first table below shows the most populated cities in Colorado with the area codes listed next to them. The next table shows the all the Colorado state area codes by number with the names of the city they are used in.

Area Codes for the Largest Cities in Colorado

All Area Codes in Colorado

303 area codeMountain (GMT -07:00)General Purpose Code72001-JAN-1947
  • Aurora
  • Denver
  • Arvada
  • Golden
  • Brighton
  • Thornton
  • Fort Lupton
  • Littleton
  • Keenesburg
  • Longmont
  • Hudson
  • Evergreen
  • Louisville
  • Idaho Springs
  • Strasburg
  • Bennett
  • Sedalia
  • Pine
  • Deer Trail
  • Allenspark
  • Englewood
  • Lone Tree
  • Byers
  • Lyons
  • Roggen
  • Orchard
719 area codeMountain (GMT -07:00)General Purpose Code27-MAR-1987
  • Colorado Springs
  • Pueblo
  • Canon City
  • Alamosa
  • Salida
  • Cheyenne Wells
  • Arapahoe
  • Campo
  • Usaf Academy
  • Branson
  • Howard
  • Creede
  • Fowler
  • La Junta
  • Center
  • Rocky Ford
  • Moffat
  • Ordway
  • Cripple Creek
  • La Jara
  • Florence
  • Leadville
  • Lake George
  • Limon
  • Manzanola
  • Fountain
  • Walsh
  • Two Buttes
  • Lamar
  • Burlington
  • Calhan
  • Stratton
  • Springfield
  • Peyton
  • Elbert
  • Penrose
  • Sanford
  • Antonito
  • Mosca
  • Hooper
  • Blanca
  • Buena Vista
  • Aguilar
  • Trinidad
  • Haswell
  • Eads
  • Karval
  • Holly
  • Granada
  • Las Animas
  • Pritchett
  • Yoder
  • Rush
  • Beulah
  • Simla
  • Denver
  • Sugar City
  • Monte Vista
  • Weston
  • Kim
  • Villa Grove
  • Saguache
  • Del Norte
  • Fort Garland
  • San Luis
  • Rye
  • Cascade
  • Manitou Springs
  • Woodland Park
  • Mc Clave
  • Wiley
  • Walsenburg
  • Sheridan Lake
  • Westcliffe
  • Genoa
  • Hugo
  • La Veta
  • Gardner
  • Deer Trail
  • Agate
  • Flagler
  • Arriba
  • Ramah
  • Jefferson
  • Fairplay
  • Hartsel
  • Trinchera
  • Boone
  • Avondale
  • Kit Carson
720 area codeMountain (GMT -07:00)General Purpose Code303,72003-MAR-1998
  • Aurora
  • Denver
  • Longmont
  • Littleton
  • Lone Tree
  • Englewood
  • Brighton
  • Arvada
  • Lyons
  • Jamestown
  • Allenspark
  • Keenesburg
  • Hudson
  • Fort Lupton
  • Idaho Springs
  • Deer Trail
  • Sedalia
  • Henderson
  • Golden
  • Black Hawk
  • Thornton
  • Evergreen
  • Boulder
970 area codeMountain (GMT -07:00)General Purpose Code21-SEP-1994
  • Grand Junction
  • Berthoud
  • Johnstown
  • Loveland
  • Fort Collins
  • Aspen
  • Montrose
  • Rangely
  • Merino
  • Glenwood Springs
  • Collbran
  • Estes Park
  • Hesperus
  • Ridgway
  • Otis
  • Durango
  • Crested Butte
  • Peetz
  • Dillon
  • Pagosa Springs
  • Fleming
  • Mesa
  • Maybell
  • Basalt
  • Hayden
  • Gypsum
  • Granby
  • De Beque
  • Parachute
  • La Salle
  • Silt
  • Brush
  • Steamboat Springs
  • Red Feather Lakes
  • Livermore
  • Fruita
  • Cortez
  • Greeley
  • Evans
  • Vail
  • Craig
  • Olathe
  • Nucla
  • Wray
  • Hotchkiss
  • Carbondale
  • Akron
  • Idalia
  • Cope
  • Joes
  • Eckley
  • Yuma
  • Kirk
  • Fort Morgan
  • Log Lane Village
  • Dinosaur
  • Anton
  • Woodrow
  • Lake City
  • Windsor
  • Dolores
  • Delta
  • Platteville
  • Milliken
  • Parshall
  • Kremmling
  • Breckenridge
  • Edwards
  • New Raymer
  • Palisade
  • Rifle
  • Ignacio
  • Bayfield
  • Amherst
  • Eaton
  • Sterling
  • Julesburg
  • Ovid
  • Sedgwick
  • Mc Coy
  • Redvale
  • Wiggins
  • Carr
  • Dove Creek
  • Paonia
  • Mancos
  • Mead
  • New Castle
  • Denver
  • Pleasant View
  • Wellington
  • Laporte
  • Slater
  • Walden
  • Grand Lake
  • Telluride
  • Oak Creek
  • Toponas
  • Gunnison
  • Weldona
  • Briggsdale
  • Hillrose
  • Flagler
  • Seibert
  • Arriba
  • Silverthorne
  • Meeker
  • Longmont
  • Nederland
  • Stoneham
  • Haxtun
  • Iliff
  • Crook
  • Eckert
  • Holyoke
  • Cedaredge
  • Bedrock
  • Cimarron
  • Grover
  • Nunn
  • Crawford
  • Somerset
  • Gateway
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