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303 Area Code in Colorado, CO
303 Area Code in Colorado, CO


303 Area Code in Colorado, CO



303 Area code info

The American 303 area code serves Denver and other 137 cities.

Primary City Denver, CO
Assigned 99%
Time Zone Mountain
Coordinates 38.68685,-104.3348


303 Area Code MAP



All Cities served by 303 area code

City Population Percent of 303 Percent of City
Acres Green, CO 3007 0% 100%
Aetna Estates, CO 834 0% 100%
Allenspark, CO 528 0% 100%
Altona, CO 501 0% 100%
Applewood, CO 7160 0% 100%
Aristocrat Ranchettes, CO 1344 0% 100%
Arvada, CO 106433 1% 100%
Aspen Park, CO 882 0% 100%
Aurora, CO 325078 2% 100%
Bark Ranch, CO 213 0% 100%
Bennett, CO 2308 0% 100%
Berkley, CO 11207 0% 100%
Black Hawk, CO 118 0% 100%
Bonanza Mountain Estates, CO 128 0% 100%
Boulder, CO 97385 0% 100%
Bow Mar, CO 866 0% 100%
Brick Center, CO 107 0% 100%
Brighton, CO 33352 0% 100%
Broomfield, CO 55889 0% 100%
Byers, CO 1160 0% 100%
Castle Pines, CO 3614 0% 100%
Castle Pines North, CO 10360 0% 100%
Castle Rock, CO 48231 0% 100%
Centennial, CO 100377 0% 100%
Central City, CO 663 0% 100%
Cherry Creek, CO 11120 0% 100%
Cherry Hills Village, CO 5987 0% 100%
Coal Creek, CO 2400 0% 100%
Columbine, CO 24280 0% 100%
Columbine Valley, CO 1256 0% 100%
Comanche Creek, CO 369 0% 100%
Commerce City, CO 45913 1% 100%
Crisman, CO 186 0% 100%
Dacono, CO 4152 0% 100%
Dakota Ridge, CO 32005 0% 100%
Deer Trail, CO 546 0% 100%
Denver, CO 600158 2% 100%
Derby, CO 7685 0% 100%
Dove Valley, CO 5243 0% 100%
Downieville-Lawson-Dumont, CO 594 0% 100%
East Pleasant View, CO 356 0% 100%
Edgewater, CO 5170 0% 100%
Elbert, CO 230 0% 100%
Eldora, CO 142 0% 100%
Eldorado Springs, CO 585 0% 100%
Elizabeth, CO 1358 0% 100%
Empire, CO 282 0% 100%
Englewood, CO 30255 0% 100%
Erie, CO 18135 0% 100%
Evergreen, CO 9038 0% 100%
Fairmount, CO 7559 0% 100%
Federal Heights, CO 11467 0% 100%
Firestone, CO 10147 0% 100%
Floyd Hill, CO 998 0% 100%
Fort Lupton, CO 7377 0% 100%
Foxfield, CO 685 0% 100%
Franktown, CO 395 0% 100%
Frederick, CO 8679 0% 100%
Genesee, CO 3609 0% 100%
Georgetown, CO 1034 0% 100%
Glendale, CO 69 0% 100%
Glendale, CO 4184 0% 100%
Gold Hill, CO 230 0% 100%
Golden, CO 18867 0% 100%
Grand View Estates, CO 528 0% 100%
Greenwood Village, CO 13925 0% 100%
Gunbarrel, CO 9263 0% 100%
Hidden Lake, CO 31 0% 100%
Highlands Ranch, CO 96713 0% 100%
Holly Hills, CO 2521 0% 100%
Hudson, CO 2356 0% 100%
Idaho Springs, CO 1717 0% 100%
Idledale, CO 252 0% 100%
Indian Hills, CO 1280 0% 100%
Inverness, CO 1532 0% 100%
Jamestown, CO 274 0% 100%
Keenesburg, CO 1127 0% 100%
Ken Caryl, CO 32438 0% 100%
Kiowa, CO 723 0% 100%
Kittredge, CO 1304 0% 100%
Lafayette, CO 24453 0% 100%
Lakeside, CO 8 0% 100%
Lakewood, CO 142980 1% 100%
Larkspur, CO 183 0% 100%
Lazy Acres, CO 920 0% 100%
Leyner, CO 29 0% 100%
Littleton, CO 41737 0% 100%
Lochbuie, CO 4726 0% 100%
Lone Tree, CO 10218 0% 100%
Longmont, CO 86270 0% 100%
Louisville, CO 18376 0% 100%
Louviers, CO 269 0% 100%
Lyons, CO 2033 0% 100%
Mead, CO 3405 0% 9%
Meridian, CO 2970 0% 100%
Morrison, CO 428 0% 100%
Mountain Meadows, CO 274 0% 100%
Mountain View, CO 507 0% 100%
Nederland, CO 1445 0% 100%
Niwot, CO 4006 0% 100%
North Washington, CO 484 0% 100%
Northglenn, CO 35789 0% 100%
Paragon Estates, CO 928 0% 100%
Parker, CO 45297 0% 100%
Peoria, CO 163 0% 100%
Perry Park, CO 1646 0% 100%
Pine Brook Hill, CO 983 0% 100%
Ponderosa Park, CO 3232 0% 100%
Rollinsville, CO 181 0% 100%
Roxborough Park, CO 9099 0% 100%
Sedalia, CO 206 0% 100%
Seven Hills, CO 121 0% 100%
Shaw Heights, CO 5116 0% 100%
Sheridan, CO 5664 0% 100%
Sherrelwood, CO 18287 0% 100%
Silver Plume, CO 170 0% 100%
St. Ann Highlands, CO 288 0% 100%
St. Mary's, CO 283 0% 100%
Stonegate, CO 8962 0% 100%
Strasburg, CO 2447 0% 100%
Sugarloaf, CO 261 0% 100%
Sunshine, CO 230 0% 100%
Superior, CO 12483 0% 100%
Tall Timber, CO 208 0% 100%
The Pinery, CO 10517 0% 100%
Thornton, CO 118772 1% 100%
Todd Creek, CO 3768 0% 100%
Twin Lakes, CO 6101 0% 100%
Upper Bear Creek, CO 1059 0% 100%
Valmont, CO 59 0% 100%
Ward, CO 150 0% 100%
Watkins, CO 653 0% 100%
Welby, CO 14846 0% 100%
West Pleasant View, CO 3840 0% 100%
Westcreek, CO 129 0% 100%
Westminster, CO 106114 0% 100%
Wheat Ridge, CO 30166 0% 100%


303 Area code history

The American area code 303 is one of the original 86 area codes created by AT&T and the Bell System in 1947. It originally served the entire state of Colorado. 303 was split in 1995 creating the need to update some of the phone numbers to area code 970. In 1998, area code 720 was created and is currently an overlay to 303. This area code now serves Denver and 137 other cities.



303 Area Code Usage

% Assigned

% Usage

Nearby Area Codes



Nearby ZIP Codes



USPS offices near 303 area code



Social Security Offices near 303 area code



DMV offices near 303 area code

  • DMV Office

    13009 South Radio Station Road
    Seneca
    (864) 882-8698
    1950.01 mi.

  • DMV Office

    2133 Gentry Memorial Highway
    Pickens
    (864) 878-1396
    1970.87 mi.

  • Greenville DMV Office - Saluda Dam

    15 Saluda Dam Road
    Greenville
    (864) 241-1147
    1989.02 mi.

  • DMV Office

    331 Highway 29 Bypass North
    Anderson
    (864) 260-2205
    1989.07 mi.

  • DMV Office

    123 O'Neal St.
    Belton
    (864) 338-5114
    1994.31 mi.

  • DMV Office #1

    300 University Ridge Suite 105
    Greenville
    (864) 241-1145
    1994.9 mi.

  • DMV Office

    610 Arlington Road
    Greer
    (864) 801-9375
    2007.38 mi.

  • DMV Office

    1310 N. Main St.
    Fountain Inn
    (864) 967-4013
    2014.52 mi.

  • Abbeville DMV Office

    1331 Haigler St
    Abbeville
    (864) 459-2147
    2019.62 mi.



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