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