Area Code Details for: 303
Location
State
Colorado
Country
US
Map
Details
State | Colorado (CO) |
Time Zone | |
Parent NPA | - |
Relief Planning in Progress | No |
In Service Date | January 1, 1947 |
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Cities
| Zipcode | City | County |
|---|---|---|
| 80017 | Aurora | Arapahoe |
| 80228 | Denver | Jefferson |
| 80230 | Denver | Denver |
| 80227 | Lakewood | Jefferson |
| 80019 | Aurora | Adams |
| 80020 | Broomfield | Broomfield |
| 80018 | Aurora | Arapahoe |
| 80020 | Westminster | Broomfield |
| 80006 | Arvada | Jefferson |
| 80011 | Aurora | Adams |
| 80013 | Aurora | Arapahoe |
| 80012 | Aurora | Arapahoe |
| 80108 | Castle Rock | Douglas |
| 80010 | Aurora | Arapahoe |
| 80011 | Aurora | Arapahoe |
| 80007 | Arvada | Jefferson |
| 80005 | Arvada | Jefferson |
| 80433 | Conifer | Jefferson |
| 80001 | Arvada | Jefferson |
| 80016 | Aurora | Arapahoe |
| 80015 | Aurora | Arapahoe |
| 80004 | Arvada | Jefferson |
| 80014 | Aurora | Arapahoe |
| 80002 | Arvada | Jefferson |
| 80003 | Arvada | Jefferson |
| 80105 | Deer Trail | Arapahoe |
| 80310 | Boulder | Boulder |
| 80314 | Boulder | Boulder |
| 80106 | Elbert | El Paso |
| 80241 | Thornton | Adams |
| 80239 | Denver | Denver |
| 80238 | Denver | Denver |
| 80401 | Golden | Jefferson |
| 80422 | Black Hawk | Gilpin |
| 80423 | Bond | Eagle |
| 80425 | Buffalo Creek | Jefferson |
| 80421 | Bailey | Park |
| 80402 | Golden | Jefferson |
| 80403 | Golden | Jefferson |
| 80419 | Golden | Jefferson |
| 80221 | Denver | Adams |
| 80749 | Sedgwick | Sedgwick |
| 80259 | Denver | Denver |
| 80257 | Denver | Denver |
| 80732 | Hereford | Weld |
| 80640 | Henderson | Adams |
| 80652 | Roggen | Weld |
| 80621 | Fort Lupton | Weld |
| 80256 | Denver | Denver |
| 80247 | Denver | Arapahoe |
| 80246 | Denver | Denver |
| 80243 | Denver | Denver |
| 80248 | Denver | Denver |
| 80448 | Grant | Park |
| 80250 | Denver | Denver |
| 80249 | Denver | Denver |
| 80293 | Denver | Denver |
| 80291 | Denver | Denver |
| 80438 | Empire | Clear Creek |
| 80439 | Evergreen | Jefferson |
| 80299 | Denver | Denver |
| 80294 | Denver | Denver |
| 80235 | Lakewood | Jefferson |
| 80290 | Denver | Denver |
| 80274 | Denver | Denver |
| 80273 | Denver | Denver |
| 80107 | Elizabeth | Elbert |
| 80436 | Dumont | Clear Creek |
| 80229 | Denver | Adams |
| 80437 | Evergreen | Jefferson |
| 80281 | Denver | Denver |
| 80301 | Boulder | Boulder |
| 80306 | Boulder | Boulder |
| 80305 | Boulder | Boulder |
| 80304 | Boulder | Boulder |
| 80307 | Boulder | Boulder |
| 80427 | Central City | Gilpin |
| 80309 | Boulder | Boulder |
| 80308 | Boulder | Boulder |
| 80303 | Boulder | Boulder |
| 80452 | Idaho Springs | Clear Creek |
| 80302 | Boulder | Boulder |
| 80235 | Denver | Jefferson |
| 80444 | Georgetown | Clear Creek |
| 80110 | Englewood | Arapahoe |
| 80234 | Denver | Adams |
| 80237 | Denver | Denver |
| 80021 | Broomfield | Jefferson |
| 80603 | Lochbuie | Weld |
| 80475 | Shawnee | Park |
| 80474 | Rollinsville | Gilpin |
| 80204 | Denver | Denver |
| 80501 | Longmont | Boulder |
| 80502 | Longmont | Boulder |
| 80476 | Silver Plume | Clear Creek |
| 80481 | Ward | Boulder |
| 80124 | Lone Tree | Douglas |
| 80465 | Morrison | Jefferson |
| 80457 | Kittredge | Jefferson |
| 80124 | Littleton | Douglas |
| 80047 | Aurora | Arapahoe |
| 80471 | Pinecliffe | Boulder |
| 80466 | Nederland | Boulder |
| 80470 | Pine | Jefferson |
| 80503 | Longmont | Boulder |
| 80453 | Idledale | Jefferson |
| 80206 | Denver | Denver |
| 80041 | Aurora | Arapahoe |
| 80205 | Denver | Denver |
| 80233 | Denver | Adams |
| 80603 | Brighton | Weld |
| 80207 | Denver | Denver |
| 80208 | Denver | Denver |
| 80046 | Aurora | Arapahoe |
| 80514 | Dacono | Weld |
| 80504 | Longmont | Weld |
| 80510 | Allenspark | Larimer |
| 80044 | Aurora | Arapahoe |
| 80042 | Aurora | Adams |
| 80516 | Erie | Boulder |
| 80045 | Aurora | Adams |
| 80125 | Littleton | Douglas |
| 80163 | Littleton | Douglas |
| 80223 | Denver | Denver |
| 80166 | Littleton | Arapahoe |
| 80165 | Littleton | Arapahoe |
| 80160 | Littleton | Arapahoe |
| 80155 | Englewood | Arapahoe |
| 80162 | Littleton | Jefferson |
| 80161 | Littleton | Arapahoe |
| 80271 | Denver | Denver |
| 80224 | Denver | Denver |
| 80203 | Denver | Denver |
| 80202 | Denver | Denver |
| 80231 | Denver | Denver |
| 80201 | Denver | Denver |
| 80109 | Castle Rock | Douglas |
| 80123 | Littleton | Jefferson |
| 80151 | Englewood | Arapahoe |
| 80128 | Littleton | Jefferson |
| 80127 | Littleton | Jefferson |
| 80130 | Littleton | Douglas |
| 80129 | Littleton | Douglas |
| 80454 | Indian Hills | Jefferson |
| 80455 | Jamestown | Boulder |
| 80126 | Littleton | Douglas |
| 80614 | Eastlake | Adams |
| 80137 | Watkins | Adams |
| 80136 | Strasburg | Adams |
| 80150 | Englewood | Arapahoe |
| 80138 | Parker | Douglas |
| 80232 | Denver | Jefferson |
| 80131 | Louviers | Douglas |
| 80135 | Sedalia | Douglas |
| 80134 | Parker | Douglas |
| 80111 | Englewood | Arapahoe |
| 80112 | Englewood | Arapahoe |
| 80120 | Littleton | Arapahoe |
| 80643 | Keenesburg | Weld |
| 80116 | Franktown | Douglas |
| 80117 | Kiowa | Elbert |
| 80113 | Englewood | Arapahoe |
| 80037 | Commerce City | Adams |
| 80264 | Denver | Denver |
| 80263 | Denver | Denver |
| 80266 | Denver | Denver |
| 80265 | Denver | Denver |
| 80236 | Denver | Denver |
| 80642 | Hudson | Weld |
| 80261 | Denver | Denver |
| 80260 | Denver | Adams |
| 80036 | Westminster | Adams |
| 80023 | Westminster | Broomfield |
| 80227 | Denver | Jefferson |
| 80025 | Eldorado Springs | Boulder |
| 80024 | Dupont | Adams |
| 80021 | Westminster | Broomfield |
| 80021 | Broomfield | Jefferson |
| 80023 | Broomfield | Broomfield |
| 80022 | Commerce City | Adams |
| 80034 | Wheat Ridge | Jefferson |
| 80033 | Wheat Ridge | Jefferson |
| 80118 | Larkspur | Douglas |
| 80035 | Westminster | Adams |
| 80027 | Louisville | Boulder |
| 80026 | Lafayette | Boulder |
| 80031 | Westminster | Adams |
| 80030 | Westminster | Adams |
| 80222 | Denver | Denver |
| 80102 | Bennett | Adams |
| 80121 | Littleton | Arapahoe |
| 80211 | Denver | Denver |
| 80516 | Frederick | Boulder |
| 80544 | Niwot | Boulder |
| 80601 | Brighton | Adams |
| 80040 | Aurora | Adams |
| 80210 | Denver | Denver |
| 80530 | Frederick | Weld |
| 80533 | Hygiene | Boulder |
| 80103 | Byers | Arapahoe |
| 80520 | Firestone | Weld |
| 80104 | Castle Rock | Douglas |
| 80122 | Littleton | Arapahoe |
| 80216 | Denver | Denver |
| 80226 | Denver | Jefferson |
| 80602 | Brighton | Adams |
| 80038 | Broomfield | Broomfield |
| 80219 | Denver | Denver |
| 80218 | Denver | Denver |
| 80217 | Denver | Denver |
| 80220 | Denver | Denver |
| 80540 | Lyons | Boulder |
| 80214 | Denver | Jefferson |
| 80212 | Denver | Denver |
| 80225 | Denver | Jefferson |
| 80209 | Denver | Denver |
| 80215 | Denver | Jefferson |
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