What is an Area Code? An area code is a section of a telephone number that denotes the broad area that the phone receiving the call is based in. Area codes were first introduced circa 1947 for operator use only. Area codes are three-digit numbers that represent Numbering Plan Areas (NPAs). The area code for a particular city or region is the series of numbers that you have to dial before someone’s number if you are making a phone call to that place from a different area. Area code 303 serves the state of Colorado.
The Table Below Shows the Towns and Cities That Use Area Code 303
| 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 |