303 Area Code – Map, Phone Lookup, Time Zone

The 303 zip code is located in Colorado (co), USA, and it includes most of the following cities: Denver, Aurora, Lakewood, … (skip to city list below).  

As part of overlay complex 303/720, area code 303 has been in service since 01 January 1947, making it the oldest area code in the area.

Currently, it is 10:31:57 AM in area code 303 (Mountain Time).

303 Area Code Phone Lookup


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303 Area Code MAP

Nearby to the 303 Area Codes

you’re probably always looking location map, cities, time zone, overlay codes, reverse phone lookup and related info. Well, one easy way to do that is by knowing your nearby area codes. That way, you don’t have to fumble through your phone’s keypad each time you want to make a call. Plus, it can come in handy when trying to find out where someone is calling from. So without further ado, here are the area codes for some of the most popular U.S. cities!

List of 303-NXX Prefixes and Corresponding Locations

We all know our location by its name and zip code, but do you know your city’s postal prefix? Chances are, unless you work for the post office or are extremely interested in the subject matter, you don’t. But prefixes play a critical role in how mail is sorted and delivered, so it’s important to be aware of them. This blog post will take a closer look at what prefixes are and their corresponding locations. Stay tuned!

Are you curious about the prefixes and corresponding locations of the area code 303 ? This infographic is a great place to start. It provides an overview of 303 area code, including its name, prefixes and date. The infographic also includes a map that shows the location of each area code. this guide is sure to come in handy. Enjoy!

NPANXXArea servedDate
303-200Denver
303-201Denver
303-202Denver
303-203Denver
303-204Denver
303-205Denver
303-206Denver
303-207Denver
303-208Denver
303-209Denver
303-210Denver
303-212Denver
303-213Denver
303-214Denver
303-215Denver
303-216Denver
303-217Denver
303-218Denver
303-219Denver
303-220Denver
303-221Denver
303-222Denver
303-223Denver
303-224Denver
303-225Denver
303-226Denver
303-227Denver
303-228Denver
303-229Denver
303-230Denver
303-231Denver
303-232Denver
303-233Denver
303-234Denver
303-235Denver
303-236Denver
303-237Denver
303-238Denver
303-239Denver
303-240Denver
303-241Denver
303-242Denver
303-243Denver
303-244Denver
303-245Denver
303-246Denver
303-247Denver
303-248Denver
303-249Denver
303-250Denver
303-251Denver
303-252Denver
303-253Denver
303-254Denver
303-255Denver
303-256Denver
303-257Denver
303-258Denver
303-259Denver
303-260Denver
303-261Denver
303-262Denver
303-263Denver
303-264Denver
303-265Denver
303-266Denver
303-267Denver
303-268Denver
303-269Denver
303-270Denver
303-271Denver
303-272Denver
303-273Denver
303-274Denver
303-275Denver
303-276Denver8/19/2021
303-277Denver
303-278Denver
303-279Denver
303-280Denver
303-281Denver
303-282Denver
303-283Denver
303-284Denver
303-285Denver
303-286Denver
303-287Denver
303-288Denver
303-289Denver
303-290Denver
303-291Denver
303-292Denver
303-293Denver
303-294Denver
303-295Denver
303-296Denver
303-297Denver
303-298Denver
303-299Denver
303-300Denver
303-301Denver
303-302Denver
303-304Fort Lupton11/18/2004
303-305Denver
303-306Denver
303-307Denver
303-308Denver
303-309Denver
303-310Denver
303-312Denver
303-313Denver
303-314Denver
303-315Denver
303-316Denver
303-317Denver
303-318Denver
303-319Denver8/12/2004
303-320Denver
303-321Denver
303-322Denver
303-323Denver
303-324Denver
303-325Denver
303-326Denver
303-327Denver
303-328Denver
303-329Denver
303-330Denver3/9/2006
303-331Denver
303-332Denver
303-333Denver
303-334Denver
303-335Denver
303-336Denver
303-337Denver
303-338Denver
303-339Denver12/15/2003
303-340Denver
303-341Denver
303-342Denver
303-343Denver
303-344Denver
303-345Denver
303-346Denver
303-347Denver
303-348Denver
303-349Denver
303-350Denver
303-351Deckers11/8/2006
303-352Denver
303-353Denver
303-354Denver
303-355Denver
303-356Denver
303-357Denver
303-358Denver
303-359Denver
303-360Denver
303-361Denver
303-362Denver
303-363Denver
303-364Denver
303-365Denver
303-366Denver
303-367Denver
303-368Denver
303-369Denver
303-370Denver
303-371Denver
303-372Denver
303-373Denver
303-374Denver
303-375Denver
303-376Denver
303-377Denver
303-378Denver
303-379Denver
303-380Denver
303-381Denver
303-382Denver
303-383Denver
303-384Denver
303-385Denver
303-386Denver
303-387Denver
303-388Denver
303-389Denver
303-390Denver
303-391Denver
303-392Denver
303-393Denver
303-394Denver
303-395Denver
303-396Denver6/1/2005
303-397Denver
303-398Denver
303-399Denver
303-400Denver
303-401Denver
303-402Denver
303-403Denver
303-404Denver
303-405Denver
303-406Denver
303-407Denver
303-408Denver
303-409Denver
303-410Denver
303-412Denver
303-413Denver
303-414Denver
303-415Denver
303-416Denver
303-417Denver
303-418Denver
303-419Denver
303-420Denver
303-421Denver
303-422Denver
303-423Denver
303-424Denver
303-425Denver
303-426Denver
303-427Denver
303-428Denver
303-429Denver
303-430Denver
303-431Denver
303-432Denver
303-433Denver
303-434Denver
303-435Denver
303-436Denver
303-437Denver
303-438Denver
303-439Denver
303-440Denver
303-441Denver
303-442Denver
303-443Denver
303-444Denver
303-445Denver
303-446Denver
303-447Denver
303-448Denver
303-449Denver
303-450Denver
303-451Denver
303-452Denver
303-453Denver
303-454Denver
303-455Denver
303-456Denver
303-457Denver
303-458Denver
303-459Denver
303-460Denver
303-461Denver
303-462Denver
303-463Denver
303-464Denver
303-465Denver
303-466Denver
303-467Denver
303-468Denver5/24/2001
303-469Denver
303-470Denver
303-471Denver
303-472Denver
303-473Denver
303-474Denver
303-475Denver
303-476Denver
303-477Denver
303-478Denver
303-479Denver
303-480Denver
303-481Denver
303-482Denver
303-483Denver
303-484Denver
303-485Longmont
303-486Denver
303-487Denver
303-488Denver
303-489Denver
303-490Denver
303-491Denver
303-492Denver
303-493Denver
303-494Denver
303-495Denver
303-496Denver4/8/2004
303-497Denver
303-498Denver4/22/2005
303-499Denver
303-500Hudson1/4/2005
303-501Denver1/26/2006
303-502Fort Lupton12/13/2005
303-503Denver
303-504Denver
303-505Denver11/9/2012
303-506Fort Lupton9/13/2001
303-507Denver
303-508Denver
303-509Denver
303-510Denver
303-512Denver
303-513Denver2/15/2002
303-514Denver
303-515Denver11/14/2011
303-516Denver
303-517Denver
303-518Denver
303-519Denver
303-520Denver
303-521Denver
303-522Denver
303-523Denver
303-524Denver
303-525Denver
303-526Denver
303-527Denver
303-528Denver
303-529Denver10/7/2019
303-530Denver
303-531Denver
303-532Longmont
303-533Denver
303-534Denver
303-535Fort Lupton
303-536Hudson
303-537Denver
303-538Denver
303-539Denver
303-540Denver
303-541Denver
303-542Denver
303-543Denver
303-544Denver
303-545Denver
303-546Denver
303-547Denver
303-548Denver
303-549Denver
303-550Denver
303-551Denver
303-552Denver
303-553Denver
303-554Denver
303-556Denver
303-557Denver
303-558Denver
303-559Denver
303-560Denver
303-561Denver
303-562Denver
303-563Denver
303-564Denver
303-565Denver
303-566Denver
303-567Denver
303-568Denver
303-569Georgetown
303-570Denver
303-571Denver
303-572Denver
303-573Denver
303-574Denver
303-575Denver
303-576Denver
303-577Denver
303-578Keenesburg9/12/2006
303-579Denver
303-580Denver
303-581Denver
303-582Denver
303-583Denver
303-584Denver
303-585Denver
303-586Denver
303-587Denver
303-588Denver
303-589Denver
303-590Denver
303-591Denver
303-592Denver
303-593Denver
303-594Denver
303-595Denver
303-596Denver
303-597Denver
303-598Denver
303-599Denver
303-600Denver
303-601Denver
303-602Denver
303-603Denver
303-604Denver
303-605Denver
303-606Denver
303-607Denver
303-608Denver
303-609Denver
303-610Denver
303-612Denver
303-613Denver
303-614Denver
303-615Denver
303-616Denver
303-617Denver
303-618Denver
303-619Denver
303-620Denver
303-621Denver
303-622Strasburg
303-623Denver
303-624Denver
303-625Denver
303-626Denver
303-627Denver
303-628Denver
303-629Denver
303-630Denver
303-632Denver
303-633Denver
303-634Denver
303-635Denver
303-636Denver
303-637Denver
303-638Denver
303-639Denver
303-640Denver
303-641Denver
303-642Denver
303-643Denver
303-644Bennett
303-645Denver
303-646Denver
303-647Deckers
303-648Denver
303-649Denver
303-650Denver
303-651Longmont
303-652Longmont
303-653Denver
303-654Denver
303-655Denver
303-656Denver
303-657Denver
303-658Denver
303-659Denver
303-660Denver
303-661Denver
303-662Denver
303-663Denver
303-664Denver
303-665Denver
303-666Denver
303-667Denver
303-668Denver
303-669Denver
303-670Denver
303-671Denver
303-672Denver
303-673Denver
303-674Denver
303-675Denver
303-676Denver
303-677Denver
303-678Longmont
303-679Denver
303-680Denver
303-681Denver
303-682Longmont
303-683Denver
303-684Longmont
303-685Denver
303-686Denver
303-687Denver
303-688Denver
303-689Denver
303-690Denver
303-691Denver
303-692Denver
303-693Denver
303-694Denver
303-695Denver
303-696Denver
303-697Denver
303-698Denver
303-699Denver
303-701Denver
303-702Longmont
303-703Denver
303-704Denver
303-705Denver
303-706Denver
303-707Denver
303-708Denver
303-709Longmont
303-710Fort Lupton
303-712Denver
303-713Denver
303-714Denver
303-715Denver
303-716Denver
303-717Fort Lupton
303-718Fort Lupton
303-719Deer Trail11/16/2006
303-720Fort Lupton6/13/2008
303-721Denver
303-722Denver
303-723Denver
303-724Denver
303-725Denver
303-726Denver
303-727Denver
303-728Denver
303-729Denver
303-730Denver
303-731Denver
303-732Keenesburg
303-733Denver
303-734Denver
303-735Denver
303-736Denver
303-737Denver
303-738Denver
303-739Denver
303-740Denver
303-741Denver
303-742Denver
303-743Denver
303-744Denver
303-745Denver
303-746Longmont
303-747Allenspark/Lyons
303-748Denver
303-749Denver
303-750Denver
303-751Denver
303-752Denver
303-753Denver
303-754Denver
303-755Denver
303-756Denver
303-757Denver
303-758Denver
303-759Denver
303-760Denver
303-761Denver
303-762Denver
303-763Denver
303-764Denver
303-765Denver
303-766Denver
303-767Denver
303-768Denver
303-769Deer Trail
303-770Denver
303-771Denver
303-772Longmont
303-773Denver
303-774Longmont
303-775Longmont
303-776Longmont
303-777Denver
303-778Denver
303-779Denver
303-780Denver
303-781Denver
303-782Denver
303-783Denver
303-784Denver
303-785Denver
303-786Denver
303-787Denver
303-788Denver
303-789Denver
303-790Denver
303-791Denver
303-792Denver
303-793Denver
303-794Denver
303-795Denver
303-796Denver
303-797Denver
303-798Denver
303-799Denver
303-800Denver
303-801Denver
303-802Denver
303-803Denver
303-804Denver
303-805Denver
303-806Denver
303-807Denver
303-808Denver
303-809Denver
303-810Denver
303-812Denver
303-813Denver
303-814Denver
303-815Denver2/3/2005
303-816Deckers
303-817Denver
303-818Denver
303-819Denver
303-820Denver
303-821Denver
303-822Byers
303-823Allenspark/Lyons
303-824Denver
303-825Denver
303-826Denver
303-827Longmont
303-828Denver
303-829Denver
303-830Denver
303-831Denver
303-832Denver
303-833Denver
303-834Longmont9/27/2006
303-835Denver
303-836Denver
303-837Denver
303-838Deckers
303-839Denver
303-840Denver
303-841Denver
303-842Denver
303-843Denver
303-844Denver
303-845Longmont
303-846Denver
303-847Denver
303-848Longmont
303-849Roggen
303-850Denver
303-851Denver
303-852Denver
303-853Denver
303-854Denver
303-855Denver
303-856Denver
303-857Fort Lupton
303-858Denver
303-859Denver
303-860Denver
303-861Denver
303-862Denver6/4/2005
303-863Denver
303-864Denver
303-865Denver
303-866Denver
303-867Denver11/4/2005
303-868Denver
303-869Denver
303-870Denver
303-871Denver
303-872Denver
303-873Denver
303-874Denver
303-875Denver
303-876Denver
303-877Denver
303-878Denver
303-879Denver
303-880Denver
303-881Denver
303-882Denver
303-883Denver
303-884Denver
303-885Denver4/12/2001
303-886Denver4/12/2001
303-887Denver4/12/2001
303-888Denver
303-889Denver
303-890Denver
303-891Denver
303-892Denver
303-893Denver
303-894Denver
303-895Denver
303-896Denver
303-897Denver
303-898Denver
303-899Denver
303-900Georgetown1/10/2007
303-901Denver
303-902Denver
303-903Denver
303-904Denver
303-905Denver
303-906Denver
303-907Denver
303-908Denver
303-909Denver
303-910Denver
303-912Denver
303-913Denver
303-914Denver
303-915Denver
303-916Denver
303-917Denver
303-918Denver
303-919Denver
303-920Denver
303-921Denver
303-922Denver
303-923Denver
303-924Denver
303-925Denver
303-926Denver
303-927Denver
303-928Denver
303-929Denver
303-930Denver
303-931Denver
303-932Denver
303-933Denver
303-934Denver
303-935Denver
303-936Denver
303-937Denver
303-938Denver
303-939Denver
303-940Denver
303-941Denver
303-942Denver
303-943Denver9/9/2021
303-944Denver
303-945Denver
303-946Denver
303-947Denver
303-948Denver
303-949Denver
303-951Denver
303-952Denver
303-953Denver
303-954Denver
303-955Denver
303-956Fort Lupton
303-957Denver
303-960Denver
303-961Denver
303-962Denver7/14/2005
303-963Denver
303-964Denver
303-965Denver
303-966Denver
303-967Denver
303-968Denver
303-969Denver
303-971Denver
303-972Denver
303-973Denver
303-974Denver
303-975Denver
303-977Denver
303-978Denver
303-979Denver
303-980Denver
303-981Denver
303-982Denver
303-984Denver
303-985Denver
303-986Denver
303-987Denver
303-988Denver
303-989Denver
303-990Fort Lupton5/16/2006
303-991Denver
303-992Denver
303-993Denver3/27/2007
303-994Denver
303-995Denver
303-996Denver
303-997Denver
303-998Denver
303-999Denver8/24/2007
  • NPA stands for Numbering Plan Area (area code), and NXX stands for central office code.
  • ‘Area served’ is the name of the locality served by an NPA-NXX combination. In the North American Numbering Plan, a rate center is defined as a geographical area used to determine local calling boundaries for billing purposes.
  • In the absence of an assignment date, the exchange code was assigned before 2001.

List of Cities in Area Code 303

Looking to find out what cities are in your area code 302? You’ve come to the right place! We’ve put together a comprehensive list of major cites and their corresponding area codes. Whether you’re looking to relocate or just curious, you’ll be able to find what you need here.

So without further ado, let’s get started! We’ve compiled a list of every city in the 303 area code with the corresponding phone number. We hope you find this information helpful!

CityCountyTime
AllensparkBoulderM
ArvadaJeffersonM
AuroraAdamsM
BaileyParkM
BennettAdamsM
Black HawkGilpinM
BondEagleM
BoulderBoulderM
BrightonAdamsM
BroomfieldBroomfieldM
Buffalo CreekJeffersonM
ByersArapahoeM
Castle RockDouglasM
Central CityGilpinM
Commerce CityAdamsM
ConiferJeffersonM
DaconoWeldM
Deer TrailArapahoeM
DenverAdamsM
DumontClear CreekM
DupontAdamsM
EastlakeAdamsM
ElbertEl PasoM
Eldorado SpringsBoulderM
ElizabethElbertM
EmpireClear CreekM
EnglewoodArapahoeM
ErieWeldM
EvergreenJeffersonM
FirestoneWeldM
Fort LuptonWeldM
FranktownDouglasM
FrederickWeldM
GeorgetownClear CreekM
GoldenJeffersonM
GrantParkM
HendersonAdamsM
HerefordWeldM
Highlands RanchDouglasM
HudsonWeldM
HygieneBoulderM
Idaho SpringsClear CreekM
IdledaleJeffersonM
Indian HillsJeffersonM
JamestownBoulderM
KeenesburgWeldM
KiowaElbertM
KittredgeJeffersonM
LafayetteBoulderM
LakewoodJeffersonM
LarkspurDouglasM
LittletonArapahoeM
LongmontBoulderM
LouisvilleBoulderM
LouviersDouglasM
LyonsBoulderM
MorrisonJeffersonM
NederlandBoulderM
NiwotBoulderM
ParkerDouglasM
PineJeffersonM
PinecliffeBoulderM
RoggenWeldM
RollinsvilleGilpinM
SedaliaDouglasM
SedgwickSedgwickM
ShawneeParkM
Silver PlumeClear CreekM
StrasburgAdamsM
ThorntonAdamsM
WardBoulderM
WatkinsAdamsM
WestminsterAdamsM
Wheat RidgeJeffersonM
  1. In the table above you will find most, but sometimes not all, of the cities and counties served by area code 303 If two or more places with the same name are located in the same state, only big cities with over 50,000 people are listed.
  2. It is currently 11:57:47AM Eastern Time (currently).