Area Code 303 Information
| Area Code | 303 |
| Population | 622214 |
| Type of Code: | General Purpose Code |
| Geographic(G) or non-geographic(N): | G |
| Is this code assigned: | Yes |
| Is this code in use: | Y |
| In service date: | 1947-01-01 |
| Planning Letter(s): | 563 |
| Location: | CO |
| Country: | US |
| Time Zone: | M |
| Parent NPA: |
Area Code Zipcodes
| Zipcode | City | State |
| 80001 | ARVADA | Colorado |
| 80002 | ARVADA | Colorado |
| 80003 | ARVADA | Colorado |
| 80003 | WESTMINSTER | Colorado |
| 80004 | ARVADA | Colorado |
| 80005 | ARVADA | Colorado |
| 80005 | WESTMINSTER | Colorado |
| 80006 | ARVADA | Colorado |
| 80007 | ARVADA | Colorado |
| 80010 | AURORA | Colorado |
| 80011 | AURORA | Colorado |
| 80011 | BUCKLEY AFB | Colorado |
| 80011 | BUCKLEY AIR FORCE BASE | Colorado |
| 80011 | BUCKLEY AIR NATL GUARD BASE | Colorado |
| 80011 | BUCKLEY ANG | Colorado |
| 80012 | AURORA | Colorado |
| 80012 | DENVER | Colorado |
| 80014 | AURORA | Colorado |
| 80014 | DENVER | Colorado |
| 80018 | AURORA | Colorado |
| 80019 | AURORA | Colorado |
| 80020 | BROOMFIELD | Colorado |
| 80020 | WESTMINSTER | Colorado |
| 80021 | BROOMFIELD | Colorado |
| 80021 | WESTMINSTER | Colorado |
| 80022 | COMMERCE CITY | Colorado |
| 80022 | DENVER | Colorado |
| 80022 | IRONDALE | Colorado |
| 80023 | BROOMFIELD | Colorado |
| 80023 | THORNTON | Colorado |
| 80023 | WESTMINSTER | Colorado |
| 80024 | DUPONT | Colorado |
| 80025 | ELDORADO SPRG | Colorado |
| 80025 | ELDORADO SPRINGS | Colorado |
| 80026 | LAFAYETTE | Colorado |
| 80027 | LOUISVILLE | Colorado |
| 80027 | SUPERIOR | Colorado |
| 80030 | WESTMINSTER | Colorado |
| 80031 | WESTMINSTER | Colorado |
| 80033 | DENVER | Colorado |
| 80033 | WHEAT RIDGE | Colorado |
| 80034 | WHEAT RIDGE | Colorado |
| 80035 | WESTMINSTER | Colorado |
| 80036 | WESTMINSTER | Colorado |
| 80037 | COMMERCE CITY | Colorado |
| 80038 | BROOMFIELD | Colorado |
| 80041 | AURORA | Colorado |
| 80044 | AURORA | Colorado |
| 80046 | AURORA | Colorado |
| 80047 | AURORA | Colorado |
| 80102 | BENNETT | Colorado |
| 80103 | BYERS | Colorado |
| 80104 | CASTLE ROCK | Colorado |
| 80105 | DEER TRAIL | Colorado |
| 80108 | CASTLE PINES | Colorado |
| 80108 | CASTLE ROCK | Colorado |
| 80109 | CASTLE ROCK | Colorado |
| 80111 | CENTENNIAL | Colorado |
| 80111 | CHERRY HILLS | Colorado |
| 80111 | CHERRY HILLS VILLAGE | Colorado |
| 80111 | CHERRY HL VLG | Colorado |
| 80111 | ENGLEWOOD | Colorado |
| 80111 | GREENWOOD VILLAGE | Colorado |
| 80111 | GREENWOOD VLG | Colorado |
| 80112 | CENTENNIAL | Colorado |
| 80112 | ENGLEWOOD | Colorado |
| 80112 | GREENWOOD VILLAGE | Colorado |
| 80112 | GREENWOOD VLG | Colorado |
| 80112 | LONE TREE | Colorado |
| 80116 | FRANKTOWN | Colorado |
| 80118 | LARKSPUR | Colorado |
| 80120 | LITTLETON | Colorado |
| 80122 | CENTENNIAL | Colorado |
| 80122 | LITTLETON | Colorado |
| 80123 | BOW MAR | Colorado |
| 80123 | COLUMBINE VALLEY | Colorado |
| 80123 | COLUMBINE VLY | Colorado |
| 80123 | DENVER | Colorado |
| 80123 | GRANTS RANCH | Colorado |
| 80123 | LAKEWOOD | Colorado |
| 80123 | LITTLETON | Colorado |
| 80124 | LITTLETON | Colorado |
| 80124 | LONE TREE | Colorado |
| 80124 | LONETREE | Colorado |
| 80125 | LITTLETON | Colorado |
| 80125 | ROXBOROUGH | Colorado |
| 80126 | HGHLNDS RANCH | Colorado |
| 80126 | HIGHLANDS RANCH | Colorado |
| 80126 | LITTLETON | Colorado |
| 80127 | DENVER | Colorado |
| 80127 | LITTLETON | Colorado |
| 80128 | LITTLETON | Colorado |
| 80129 | HGHLNDS RANCH | Colorado |
| 80129 | HIGHLANDS RANCH | Colorado |
| 80129 | LITTLETON | Colorado |
| 80130 | HGHLNDS RANCH | Colorado |
| 80130 | HIGHLANDS RANCH | Colorado |
| 80130 | LITTLETON | Colorado |
| 80131 | LOUVIERS | Colorado |
| 80134 | LONE TREE | Colorado |
| 80134 | PARKER | Colorado |
| 80135 | DECKERS | Colorado |
| 80135 | SEDALIA | Colorado |
| 80136 | STRASBURG | Colorado |
| 80137 | WATKINS | Colorado |
| 80138 | PARKER | Colorado |
| 80160 | LITTLETON | Colorado |
| 80161 | CENTENNIAL | Colorado |
| 80161 | LITTLETON | Colorado |
| 80162 | LITTLETON | Colorado |
| 80163 | HGHLNDS RANCH | Colorado |
| 80163 | HIGHLANDS RANCH | Colorado |
| 80163 | LITTLETON | Colorado |
| 80165 | LITTLETON | Colorado |
| 80165 | LITTLETON CITY OFFICES | Colorado |
| 80166 | ARAPAHOE COUNTY OFFICES | Colorado |
| 80166 | LITTLETON | Colorado |
| 80201 | DENVER | Colorado |
| 80202 | DENVER | Colorado |
| 80203 | DENVER | Colorado |
| 80204 | DENVER | Colorado |
| 80206 | DENVER | Colorado |
| 80207 | DENVER | Colorado |
| 80208 | DENVER | Colorado |
| 80208 | UNIVERSITY OF DENVER | Colorado |
| 80209 | DENVER | Colorado |
| 80210 | DENVER | Colorado |
| 80211 | DENVER | Colorado |
| 80212 | DENVER | Colorado |
| 80212 | LAKESIDE | Colorado |
| 80212 | WHEAT RIDGE | Colorado |
| 80214 | DENVER | Colorado |
| 80214 | EDGEWATER | Colorado |
| 80214 | LAKEWOOD | Colorado |
| 80214 | WHEAT RIDGE | Colorado |
| 80215 | DENVER | Colorado |
| 80215 | LAKEWOOD | Colorado |
| 80215 | WHEAT RIDGE | Colorado |
| 80216 | COMMERCE CITY | Colorado |
| 80216 | DENVER | Colorado |
| 80217 | DENVER | Colorado |
| 80218 | DENVER | Colorado |
| 80219 | DENVER | Colorado |
| 80220 | DENVER | Colorado |
| 80221 | DENVER | Colorado |
| 80221 | FEDERAL HEIGHTS | Colorado |
| 80221 | FEDERAL HGTS | Colorado |
| 80221 | THORNTON | Colorado |
| 80221 | WESTMINSTER | Colorado |
| 80222 | DENVER | Colorado |
| 80223 | DENVER | Colorado |
| 80224 | DENVER | Colorado |
| 80225 | DENVER | Colorado |
| 80225 | DENVER FEDERAL CENTER | Colorado |
| 80225 | LAKEWOOD | Colorado |
| 80226 | DENVER | Colorado |
| 80226 | LAKEWOOD | Colorado |
| 80227 | DENVER | Colorado |
| 80227 | LAKEWOOD | Colorado |
| 80228 | DENVER | Colorado |
| 80228 | LAKEWOOD | Colorado |
| 80229 | DENVER | Colorado |
| 80229 | THORNTON | Colorado |
| 80229 | WELBY | Colorado |
| 80231 | DENVER | Colorado |
| 80232 | DENVER | Colorado |
| 80232 | LAKEWOOD | Colorado |
| 80233 | DENVER | Colorado |
| 80233 | NORTH GLENN | Colorado |
| 80233 | NORTHGLENN | Colorado |
| 80233 | THORNTON | Colorado |
| 80234 | DENVER | Colorado |
| 80234 | FEDERAL HEIGHTS | Colorado |
| 80234 | NORTH GLENN | Colorado |
| 80234 | NORTHGLENN | Colorado |
| 80234 | WESTMINSTER | Colorado |
| 80235 | DENVER | Colorado |
| 80235 | LAKEWOOD | Colorado |
| 80236 | DENVER | Colorado |
| 80236 | FORT LOGAN | Colorado |
| 80236 | FT LOGAN | Colorado |
| 80236 | LAKEWOOD | Colorado |
| 80237 | DENVER | Colorado |
| 80238 | DENVER | Colorado |
| 80238 | MONTBELLO | Colorado |
| 80239 | DENVER | Colorado |
| 80241 | DENVER | Colorado |
| 80241 | EAST LAKE | Colorado |
| 80241 | NORTHGLENN | Colorado |
| 80241 | THORNTON | Colorado |
| 80241 | WESTMINSTER | Colorado |
| 80243 | CO DMV DEPT OF REV | Colorado |
| 80243 | DENVER | Colorado |
| 80244 | DENVER | Colorado |
| 80244 | US WEST COMMUNICATIONS | Colorado |
| 80246 | DENVER | Colorado |
| 80246 | GLENDALE | Colorado |
| 80248 | DENVER | Colorado |
| 80250 | DENVER | Colorado |
| 80251 | Denver | Colorado |
| 80251 | National Farmers Union | Colorado |
| 80256 | DENVER | Colorado |
| 80256 | US BANK | Colorado |
| 80257 | DENVER | Colorado |
| 80257 | US COURT OF APPEALS 10TH CIR | Colorado |
| 80259 | DENVER | Colorado |
| 80259 | SMALL BUSINESS ADM | Colorado |
| 80260 | DENVER | Colorado |
| 80260 | FEDERAL HEIGHTS | Colorado |
| 80260 | FEDERAL HGTS | Colorado |
| 80260 | NORTHGLENN | Colorado |
| 80260 | THORNTON | Colorado |
| 80260 | WESTMINSTER | Colorado |
| 80261 | CO DEPT OF REVENUE | Colorado |
| 80261 | DENVER | Colorado |
| 80262 | DENVER | Colorado |
| 80262 | UNIV OF COLORADO MED CTR | Colorado |
| 80263 | AFFILIATED BANKS SERVICE CO | Colorado |
| 80263 | DENVER | Colorado |
| 80264 | DENVER | Colorado |
| 80265 | DENVER | Colorado |
| 80271 | DENVER | Colorado |
| 80271 | WELLS FARGO BANK | Colorado |
| 80273 | BLUE CROSS BLUE SHIELD OF CO | Colorado |
| 80273 | DENVER | Colorado |
| 80274 | DENVER | Colorado |
| 80274 | WELLS FARGO BANK | Colorado |
| 80281 | DENVER | Colorado |
| 80281 | WELLS FARGO BANK | Colorado |
| 80290 | DENVER | Colorado |
| 80291 | DENVER | Colorado |
| 80291 | WELLS FARGO BANK | Colorado |
| 80293 | DENVER | Colorado |
| 80294 | DENVER | Colorado |
| 80294 | Federal Bldg, Us Courthouse | Colorado |
| 80294 | FEDERAL BLDG/US COURTHOUSE | Colorado |
| 80299 | DENVER | Colorado |
| 80299 | WESTERN AREA USPS | Colorado |
| 80301 | BOULDER | Colorado |
| 80303 | BOULDER | Colorado |
| 80304 | BOULDER | Colorado |
| 80305 | BOULDER | Colorado |
| 80306 | BOULDER | Colorado |
| 80307 | BOULDER | Colorado |
| 80308 | BOULDER | Colorado |
| 80309 | BOULDER | Colorado |
| 80309 | UNIVERSITY OF COLORADO | Colorado |
| 80310 | BOULDER | Colorado |
| 80310 | UNIV OF CO DORMS | Colorado |
| 80314 | BOULDER | Colorado |
| 80314 | IBM CORP | Colorado |
| 80401 | EVERGREEN | Colorado |
| 80401 | GOLDEN | Colorado |
| 80401 | LAKEWOOD | Colorado |
| 80402 | GOLDEN | Colorado |
| 80403 | ARVADA | Colorado |
| 80403 | BLACKHAWK | Colorado |
| 80403 | GOLDEN | Colorado |
| 80419 | GOLDEN | Colorado |
| 80419 | JEFFERSON COUNTY | Colorado |
| 80425 | BUFFALO CREEK | Colorado |
| 80433 | ASPEN PARK | Colorado |
| 80433 | CONIFER | Colorado |
| 80433 | FOXTON | Colorado |
| 80436 | DUMONT | Colorado |
| 80437 | EVERGREEN | Colorado |
| 80438 | EMPIRE | Colorado |
| 80439 | EVERGREEN | Colorado |
| 80439 | GOLDEN | Colorado |
| 80444 | GEORGETOWN | Colorado |
| 80452 | IDAHO SPRINGS | Colorado |
| 80453 | IDLEDALE | Colorado |
| 80454 | INDIAN HILLS | Colorado |
| 80457 | KITTREDGE | Colorado |
| 80465 | MORRISON | Colorado |
| 80470 | PINE | Colorado |
| 80476 | SILVER PLUME | Colorado |
| 80501 | LONGMONT | Colorado |
| 80502 | LONGMONT | Colorado |
| 80503 | LONGMONT | Colorado |
| 80503 | NIWOT | Colorado |
| 80504 | FIRESTONE | Colorado |
| 80504 | FREDERICK | Colorado |
| 80504 | LONGMONT | Colorado |
| 80504 | MEAD | Colorado |
| 80504 | NIWOT | Colorado |
| 80510 | ALLENSPARK | Colorado |
| 80514 | DACONO | Colorado |
| 80514 | ERIE | Colorado |
| 80516 | ERIE | Colorado |
| 80516 | FREDERICK | Colorado |
| 80520 | FIRESTONE | Colorado |
| 80530 | FREDERICK | Colorado |
| 80533 | HYGIENE | Colorado |
| 80540 | LYONS | Colorado |
| 80544 | NIWOT | Colorado |
| 80601 | BRIGHTON | Colorado |
| 80602 | BRIGHTON | Colorado |
| 80602 | THORNTON | Colorado |
| 80603 | BRIGHTON | Colorado |
| 80603 | COMMERCE CITY | Colorado |
| 80603 | LOCHBUIE | Colorado |
| 80614 | EASTLAKE | Colorado |
| 80621 | FORT LUPTON | Colorado |
| 80621 | FT LUPTON | Colorado |
| 80621 | WATTENBURG | Colorado |
| 80642 | HUDSON | Colorado |
| 80643 | KEENESBURG | Colorado |
| 80649 | ORCHARD | Colorado |
| 80652 | ROGGEN | Colorado |
FAQ
Where is area code 303?
The Area code 303 is located in Colorado and includes the following cities:
Arvada Aurora Boulder Brighton Broomfield Castle Rock Castlewood Columbine Commerce City Denver Englewood Highlands Ranch Ken Caryl Lafayette Lakewood Littleton Longmont Loveland Northglenn Parker Southglenn Thornton Westminster Wheat Ridge