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

ZipcodeCityCounty
80017AuroraArapahoe
80228DenverJefferson
80230DenverDenver
80227LakewoodJefferson
80019AuroraAdams
80020BroomfieldBroomfield
80018AuroraArapahoe
80020WestminsterBroomfield
80006ArvadaJefferson
80011AuroraAdams
80013AuroraArapahoe
80012AuroraArapahoe
80108Castle RockDouglas
80010AuroraArapahoe
80011AuroraArapahoe
80007ArvadaJefferson
80005ArvadaJefferson
80433ConiferJefferson
80001ArvadaJefferson
80016AuroraArapahoe
80015AuroraArapahoe
80004ArvadaJefferson
80014AuroraArapahoe
80002ArvadaJefferson
80003ArvadaJefferson
80105Deer TrailArapahoe
80310BoulderBoulder
80314BoulderBoulder
80106ElbertEl Paso
80241ThorntonAdams
80239DenverDenver
80238DenverDenver
80401GoldenJefferson
80422Black HawkGilpin
80423BondEagle
80425Buffalo CreekJefferson
80421BaileyPark
80402GoldenJefferson
80403GoldenJefferson
80419GoldenJefferson
80221DenverAdams
80749SedgwickSedgwick
80259DenverDenver
80257DenverDenver
80732HerefordWeld
80640HendersonAdams
80652RoggenWeld
80621Fort LuptonWeld
80256DenverDenver
80247DenverArapahoe
80246DenverDenver
80243DenverDenver
80248DenverDenver
80448GrantPark
80250DenverDenver
80249DenverDenver
80293DenverDenver
80291DenverDenver
80438EmpireClear Creek
80439EvergreenJefferson
80299DenverDenver
80294DenverDenver
80235LakewoodJefferson
80290DenverDenver
80274DenverDenver
80273DenverDenver
80107ElizabethElbert
80436DumontClear Creek
80229DenverAdams
80437EvergreenJefferson
80281DenverDenver
80301BoulderBoulder
80306BoulderBoulder
80305BoulderBoulder
80304BoulderBoulder
80307BoulderBoulder
80427Central CityGilpin
80309BoulderBoulder
80308BoulderBoulder
80303BoulderBoulder
80452Idaho SpringsClear Creek
80302BoulderBoulder
80235DenverJefferson
80444GeorgetownClear Creek
80110EnglewoodArapahoe
80234DenverAdams
80237DenverDenver
80021BroomfieldJefferson
80603LochbuieWeld
80475ShawneePark
80474RollinsvilleGilpin
80204DenverDenver
80501LongmontBoulder
80502LongmontBoulder
80476Silver PlumeClear Creek
80481WardBoulder
80124Lone TreeDouglas
80465MorrisonJefferson
80457KittredgeJefferson
80124LittletonDouglas
80047AuroraArapahoe
80471PinecliffeBoulder
80466NederlandBoulder
80470PineJefferson
80503LongmontBoulder
80453IdledaleJefferson
80206DenverDenver
80041AuroraArapahoe
80205DenverDenver
80233DenverAdams
80603BrightonWeld
80207DenverDenver
80208DenverDenver
80046AuroraArapahoe
80514DaconoWeld
80504LongmontWeld
80510AllensparkLarimer
80044AuroraArapahoe
80042AuroraAdams
80516ErieBoulder
80045AuroraAdams
80125LittletonDouglas
80163LittletonDouglas
80223DenverDenver
80166LittletonArapahoe
80165LittletonArapahoe
80160LittletonArapahoe
80155EnglewoodArapahoe
80162LittletonJefferson
80161LittletonArapahoe
80271DenverDenver
80224DenverDenver
80203DenverDenver
80202DenverDenver
80231DenverDenver
80201DenverDenver
80109Castle RockDouglas
80123LittletonJefferson
80151EnglewoodArapahoe
80128LittletonJefferson
80127LittletonJefferson
80130LittletonDouglas
80129LittletonDouglas
80454Indian HillsJefferson
80455JamestownBoulder
80126LittletonDouglas
80614EastlakeAdams
80137WatkinsAdams
80136StrasburgAdams
80150EnglewoodArapahoe
80138ParkerDouglas
80232DenverJefferson
80131LouviersDouglas
80135SedaliaDouglas
80134ParkerDouglas
80111EnglewoodArapahoe
80112EnglewoodArapahoe
80120LittletonArapahoe
80643KeenesburgWeld
80116FranktownDouglas
80117KiowaElbert
80113EnglewoodArapahoe
80037Commerce CityAdams
80264DenverDenver
80263DenverDenver
80266DenverDenver
80265DenverDenver
80236DenverDenver
80642HudsonWeld
80261DenverDenver
80260DenverAdams
80036WestminsterAdams
80023WestminsterBroomfield
80227DenverJefferson
80025Eldorado SpringsBoulder
80024DupontAdams
80021WestminsterBroomfield
80021BroomfieldJefferson
80023BroomfieldBroomfield
80022Commerce CityAdams
80034Wheat RidgeJefferson
80033Wheat RidgeJefferson
80118LarkspurDouglas
80035WestminsterAdams
80027LouisvilleBoulder
80026LafayetteBoulder
80031WestminsterAdams
80030WestminsterAdams
80222DenverDenver
80102BennettAdams
80121LittletonArapahoe
80211DenverDenver
80516FrederickBoulder
80544NiwotBoulder
80601BrightonAdams
80040AuroraAdams
80210DenverDenver
80530FrederickWeld
80533HygieneBoulder
80103ByersArapahoe
80520FirestoneWeld
80104Castle RockDouglas
80122LittletonArapahoe
80216DenverDenver
80226DenverJefferson
80602BrightonAdams
80038BroomfieldBroomfield
80219DenverDenver
80218DenverDenver
80217DenverDenver
80220DenverDenver
80540LyonsBoulder
80214DenverJefferson
80212DenverDenver
80225DenverJefferson
80209DenverDenver
80215DenverJefferson
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