Colorado number prefixes
- Acres Green
- Aetna Estates
- Allenspark
- Altona
- Applewood
- Aristocrat Ranchettes
- Arvada
- Aspen Park
- Aurora
- Bark Ranch
- Bennett
- Berkley
- Black Hawk
- Bonanza Mountain Estates
- Boulder
- Bow Mar
- Brick Center
- Brighton
- Broomfield
- Byers
- Castle Pines
- Castle Pines North
- Castle Rock
- Centennial
- Central City
- Cherry Creek
- Cherry Hills Village
- Coal Creek
- Columbine
- Columbine Valley
- Comanche Creek
- Commerce City
- Crisman
- Dacono
- Dakota Ridge
- Deer Trail
- Denver
- Derby
- Dove Valley
- Downieville-Lawson-Dumont
- East Pleasant View
- Edgewater
- Elbert
- Eldora
- Eldorado Springs
- Elizabeth
- Empire
- Englewood
- Erie
- Evergreen
- Fairmount
- Federal Heights
- Firestone
- Floyd Hill
- Fort Lupton
- Foxfield
- Franktown
- Frederick
- Genesee
- Georgetown
- Glendale
- Glendale
- Golden
- Gold Hill
- Grand View Estates
- Greenwood Village
- Gunbarrel
- Hidden Lake
- Highlands Ranch
- Holly Hills
- Hudson
- Idaho Springs
- Idledale
- Indian Hills
- Inverness
- Jamestown
- Keenesburg
- Ken Caryl
- Kiowa
- Kittredge
- Lafayette
- Lakeside
- Lakewood
- Larkspur
- Lazy Acres
- Leyner
- Littleton
- Lochbuie
- Lone Tree
- Longmont
- Louisville
- Louviers
- Lyons
- Meridian
- Morrison
- Mountain Meadows
- Mountain View
- Nederland
- Niwot
- Northglenn
- North Washington
- Paragon Estates
- Parker
- Peoria
- Perry Park
- Pine Brook Hill
- Ponderosa Park
- Rollinsville
- Roxborough Park
- St. Ann Highlands
- St. Mary's
- Sedalia
- Seven Hills
- Shaw Heights
- Sheridan
- Sherrelwood
- Silver Plume
- Stonegate
- Strasburg
- Sugarloaf
- Sunshine
- Superior
- Tall Timber
- The Pinery
- Thornton
- Todd Creek
- Twin Lakes
- Upper Bear Creek
- Valmont
- Ward
- Watkins
- Welby
- Westcreek
- Westminster
- West Pleasant View
- Wheat Ridge
- Aguilar
- Air Force Academy
- Alamosa
- Alamosa East
- Alma
- Alpine
- Antonito
- Arriba
- Avondale
- Bethune
- Beulah Valley
- Black Forest
- Blanca
- Blende
- Bonanza
- Boone
- Brandon
- Branson
- Brookside
- Buena Vista
- Burlington
- Calhan
- Campo
- Ca
- Capulin
- Cascade-Chipita Park
- Center
- Cheraw
- Cheyenne Wells
- Cimarron Hills
- City of Creede
- Coal Creek
- Coaldale
- Cokedale
- Colorado City
- Colorado Springs
- Conejos
- Cotopaxi
- Crestone
- Cripple Creek
- Crowley
- Del Norte
- Divide
- Eads
- Ellicott
- El Moro
- Fairplay
- Flagler
- Florence
- Florissant
- Fort Carson
- Fort Garland
- Fountain
- Fowler
- Garfield
- Genoa
- Gerrard
- Gleneagle
- Goldfield
- Granada
- Green Mountain Falls
- Guffey
- Hartman
- Hasty
- Haswell
- Hoehne
- Holly
- Hooper
- Howard
- Hugo
- Jansen
- Johnson Village
- Kim
- Kit Carson
- La Jara
- La Junta
- La Junta Gardens
- Lamar
- Las Animas
- La Veta
- Leadville
- Leadville North
- Limon
- Lincoln Park
- Lynn
- Manassa
- Manitou Springs
- Manzanola
- Maysville
- Midland
- Moffat
- Monte Vista
- Monument
- North La Junta
- Olney Springs
- Ordway
- Palmer Lake
- Penrose
- Peyton
- Poncha Springs
- Pritchett
- Pueblo
- Pueblo West
- Ramah
- Rock Creek Park
- Rockvale
- Rocky Ford
- Romeo
- Rye
- Saguache
- Salida
- Salt Creek
- San Acacio
- Sanford
- San Luis
- Security-Widefield
- Segundo
- Sheridan Lake
- Silver Cliff
- Simla
- Smeltertown
- South Fork
- Springfield
- Starkville
- Stonewall Gap
- Stratmoor
- Stratton
- Sugar City
- Swink
- Towner
- Trinidad
- Twin Lakes
- Two Buttes
- Valdez
- Victor
- Vilas
- Vineland
- Vona
- Walsenburg
- Walsh
- Westcliffe
- Weston
- Wiley
- Williamsburg
- Woodland Park
- Woodmoor
- Akron
- Amherst
- Arboles
- Aspen
- Atwood
- Ault
- Avon
- Basalt
- Battlement Mesa
- Bayfield
- Berthoud
- Blue River
- Blue Sky
- Breckenridge
- Brush
- Carbondale
- Cathedral
- Catherine
- Cattle Creek
- Cedaredge
- Chacra
- Clifton
- Collbran
- Colona
- Copper Mountain
- Cortez
- Craig
- Crawford
- Crested Butte
- Crook
- De Beque
- Delta
- Dillon
- Dinosaur
- Dolores
- Dotsero
- Dove Creek
- Durango
- Eagle
- Eaton
- Eckley
- Edwards
- El Jebel
- Estes Park
- Evans
- Fleming
- Fort Collins
- Fort Morgan
- Fraser
- Frisco
- Fruita
- Fruitvale
- Fulford
- Garden City
- Gilcrest
- Glenwood Springs
- Granby
- Grand Junction
- Grand Lake
- Greeley
- Grover
- Gunnison
- Gypsum
- Haxtun
- Hayden
- Heeney
- Hillrose
- Holyoke
- Hotchkiss
- Hot Sulphur Springs
- Idalia
- Ignacio
- Iliff
- Jackson Lake
- Joes
- Johnstown
- Julesburg
- Kersey
- Keystone
- Kirk
- Kremmling
- Laird
- Lake City
- Laporte
- La Salle
- Lewis
- Loghill Village
- Log Lane Village
- Loma
- Loveland
- McCoy
- Mancos
- Marble
- Maybell
- Mead
- Meeker
- Merino
- Milliken
- Minturn
- Montezuma
- Montrose
- Morgan Heights
- Mountain Village
- Mount Crested Butte
- Mulford
- Naturita
- New Castle
- No Name
- Norrie
- Norwood
- Nucla
- Nunn
- Oak Creek
- Olathe
- Ophir
- Orchard
- Orchard City
- Orchard Mesa
- Otis
- Ouray
- Ovid
- Padroni
- Pagosa Springs
- Palisade
- Paoli
- Paonia
- Parachute
- Parshall
- Peetz
- Phippsburg
- Piedra
- Pierce
- Pitkin
- Platteville
- Portland
- Rangely
- Raymer (New Raymer)
- Red Cliff
- Red Feather Lakes
- Redlands
- Redstone
- Redvale
- Rico
- Ridgway
- Rifle
- Saddle Ridge
- Sawpit
- Sedgwick
- Seibert
- Severance
- Silt
- Silverthorne
- Silverton
- Snowmass Village
- Snyder
- Southern Ute
- Steamboat Springs
- Sterling
- Tabernash
- Telluride
- Timnath
- Towaoc
- Trail Side
- Vail
- Vernon
- Walden
- Weldona
- Wellington
- Wiggins
- Windsor
- Winter Park
- Wolcott
- Woody Creek
- Wray
- Yampa
- Yuma