303

Denver, Colorado

Colorado · Mountain (UTC-7) · · 18 cities · Overlay: 720, 983

Major City
Denver
Time Zone
Mountain (UTC-7)
Current Local Time
Overlay Codes
Cities Served
18
Additional Details
Established
1947
Type
Original (1947)
Active Prefixes
800
Wireless Lines
25%

About Area Code 303

Area code 303 is one of the original 86 area codes established in 1947 when AT&T and the Bell System created the North American Numbering Plan. It has served the Denver area for over 75 years. This area code shares its territory with overlay codes 720 and 983, meaning callers must dial all 10 digits for local calls. The area is in the Mountain time zone. It covers 18 cities and communities including Arvada, Aurora, Boulder, Brighton, Broomfield and 13 more.

Phone Number Prefixes in Area Code 303

800 active NXX prefixes — 25% wireless, 75% landline. Each prefix (NXX) represents up to 10,000 phone numbers.

CenturyLink 449 (56%)Verizon Wireless 60 (8%)Lumen/Level 3 60 (8%)T-Mobile 39 (5%)AT&T Mobility 35 (4%)
PrefixCarrierTypeRate Center
303-200Teleport Communications AmericaLandlineDenver
303-201Usa Mobility WirelessWirelessDenver
303-202CenturyLinkLandlineDenver
303-203American Messaging ServicesLandlineDenver
303-204Verizon WirelessWirelessDenver
303-205CenturyLinkLandlineDenver
303-206Usa Mobility WirelessWirelessDenver
303-207Usa Mobility WirelessWirelessDenver
303-208Usa Mobility WirelessWirelessDenver
303-209MCI/VerizonWirelessDenver
303-210T-MobileWirelessDenver
303-211Multiple Ocn ListingLandlineXxxxxxxxxx
303-212American Messaging ServicesLandlineDenver
303-213Usa Mobility WirelessWirelessDenver
303-214MCI/VerizonWirelessDenver
303-215CenturyLinkLandlineDenver
303-216CenturyLinkLandlineDenver
303-217MCI/VerizonWirelessDenver
303-218MCI/VerizonWirelessDenver
303-219MCI/VerizonWirelessDenver
303-220CenturyLinkLandlineDenver
303-221CenturyLinkLandlineDenver
303-222MCI/VerizonWirelessDenver
303-223Lumen/Level 3LandlineDenver
303-224CenturyLinkLandlineDenver
303-225Lumen/Level 3LandlineDenver
303-226Lumen/Level 3LandlineDenver
303-227CenturyLinkLandlineDenver
303-228Lumen/Level 3LandlineDenver
303-229Verizon WirelessWirelessDenver
303-230Usa Mobility WirelessWirelessDenver
303-231CenturyLinkLandlineDenver
303-232CenturyLinkLandlineDenver
303-233CenturyLinkLandlineDenver
303-234CenturyLinkLandlineDenver
303-235CenturyLinkLandlineDenver
303-236CenturyLinkLandlineDenver
303-237CenturyLinkLandlineDenver
303-238CenturyLinkLandlineDenver
303-239CenturyLinkLandlineDenver
303-240Usa Mobility WirelessWirelessDenver
303-241Verizon WirelessWirelessDenver
303-242MCI/VerizonWirelessDenver
303-243N.E. Colorado CellularWirelessDenver
303-244CenturyLinkLandlineDenver
303-245CenturyLinkLandlineDenver
303-246T-MobileWirelessDenver
303-247CenturyLinkLandlineDenver
303-248Teleport Communications AmericaLandlineDenver
303-249AT&T MobilityWirelessDenver
303-250AT&T MobilityWirelessDenver
303-251Usa Mobility WirelessWirelessDenver
303-252CenturyLinkLandlineDenver
303-253Teleport Communications AmericaLandlineDenver
303-254CenturyLinkLandlineDenver
303-255CenturyLinkLandlineDenver
303-256Teleport Communications AmericaLandlineDenver
303-257T-MobileWirelessDenver
303-258CenturyLinkLandlineDenver
303-259American Messaging ServicesLandlineDenver
303-260CenturyLinkLandlineDenver
303-261CenturyLinkLandlineDenver
303-262Teleport Communications AmericaLandlineDenver
303-263Verizon WirelessWirelessDenver
303-264Teleport Communications AmericaLandlineDenver
303-265CenturyLinkLandlineDenver
303-266Usa Mobility WirelessWirelessDenver
303-267CenturyLinkLandlineDenver
303-268Lumen/Level 3LandlineDenver
303-269CenturyLinkLandlineDenver
303-270CenturyLinkLandlineDenver
303-271CenturyLinkLandlineDenver
303-272CenturyLinkLandlineDenver
303-273CenturyLinkLandlineDenver
303-274CenturyLinkLandlineDenver
303-275CenturyLinkLandlineDenver
303-276OnvoyLandlineDenver
303-277CenturyLinkLandlineDenver
303-278CenturyLinkLandlineDenver
303-279CenturyLinkLandlineDenver
303-280CenturyLinkLandlineDenver
303-281CenturyLinkLandlineDenver
303-282CenturyLinkLandlineDenver
303-283CenturyLinkLandlineDenver
303-284ComcastLandlineDenver
303-285Lumen/Level 3LandlineDenver
303-286CenturyLinkLandlineDenver
303-287CenturyLinkLandlineDenver
303-288CenturyLinkLandlineDenver
303-289CenturyLinkLandlineDenver
303-290CenturyLinkLandlineDenver
303-291CenturyLinkLandlineDenver
303-292CenturyLinkLandlineDenver
303-293CenturyLinkLandlineDenver
303-294CenturyLinkLandlineDenver
303-295CenturyLinkLandlineDenver
303-296CenturyLinkLandlineDenver
303-297CenturyLinkLandlineDenver
303-298CenturyLinkLandlineDenver
303-299CenturyLinkLandlineDenver
303-300CenturyLinkLandlineDenver
303-301Lumen/Level 3LandlineDenver
303-302MCI/VerizonWirelessDenver
303-303Hd CarrierLandlineDenver
303-304AT&T MobilityWirelessFortlupton
303-305MCI/VerizonWirelessDenver
303-306CenturyLinkLandlineDenver
303-307CenturyLinkLandlineDenver
303-308CenturyLinkLandlineDenver
303-309Lumen/Level 3LandlineDenver
303-310American Messaging ServicesLandlineDenver
303-311Multiple Ocn ListingLandlineXxxxxxxxxx
303-312CenturyLinkLandlineDenver
303-313CenturyLinkLandlineDenver
303-314CenturyLinkLandlineDenver
303-315CenturyLinkLandlineDenver
303-316CenturyLinkLandlineDenver
303-317CenturyLinkLandlineDenver
303-318CenturyLinkLandlineDenver
303-319Elbert County WirelessWirelessDenver
303-320CenturyLinkLandlineDenver
303-321CenturyLinkLandlineDenver
303-322CenturyLinkLandlineDenver
303-323MCI/VerizonWirelessDenver
303-324AT&T MobilityWirelessDenver
303-325Lumen/Level 3LandlineDenver
303-326CenturyLinkLandlineDenver
303-327Lumen/Level 3LandlineDenver
303-328MCI/VerizonWirelessDenver
303-329CenturyLinkLandlineDenver
303-330OnvoyLandlineDenver
303-331CenturyLinkLandlineDenver
303-332T-MobileWirelessDenver
303-333CenturyLinkLandlineDenver
303-334MCI/VerizonWirelessDenver
303-335Verizon WirelessWirelessDenver
303-336CenturyLinkLandlineDenver
303-337CenturyLinkLandlineDenver
303-338CenturyLinkLandlineDenver
303-339OnvoyLandlineDenver
303-340CenturyLinkLandlineDenver
303-341CenturyLinkLandlineDenver
303-342CenturyLinkLandlineDenver
303-343CenturyLinkLandlineDenver
303-344CenturyLinkLandlineDenver
303-345Lumen/Level 3LandlineDenver
303-346CenturyLinkLandlineDenver
303-347CenturyLinkLandlineDenver
303-348CenturyLinkLandlineDenver
303-349Verizon WirelessWirelessDenver
303-350AT&T MobilityWirelessDenver
303-351OnvoyLandlineDeckers
303-352CenturyLinkLandlineDenver
303-353ComcastLandlineDenver
303-354Teleport Communications AmericaLandlineDenver
303-355CenturyLinkLandlineDenver
303-356T-MobileWirelessDenver
303-357MCI/VerizonWirelessDenver
303-358Verizon WirelessWirelessDenver
303-359T-MobileWirelessDenver
303-360CenturyLinkLandlineDenver
303-361CenturyLinkLandlineDenver
303-362Teleport Communications AmericaLandlineDenver
303-363CenturyLinkLandlineDenver
303-364CenturyLinkLandlineDenver
303-365CenturyLinkLandlineDenver
303-366CenturyLinkLandlineDenver
303-367CenturyLinkLandlineDenver
303-368CenturyLinkLandlineDenver
303-369CenturyLinkLandlineDenver
303-370CenturyLinkLandlineDenver
303-371CenturyLinkLandlineDenver
303-372CenturyLinkLandlineDenver
303-373CenturyLinkLandlineDenver
303-374Teleport Communications AmericaLandlineDenver
303-375CenturyLinkLandlineDenver
303-376Lumen/Level 3LandlineDenver
303-377CenturyLinkLandlineDenver
303-378AT&T MobilityWirelessDenver
303-379Teleport Communications AmericaLandlineDenver
303-380CenturyLinkLandlineDenver
303-381Lumen/Level 3LandlineDenver
303-382CenturyLinkLandlineDenver
303-383CenturyLinkLandlineDenver
303-384CenturyLinkLandlineDenver
303-385Lumen/Level 3LandlineDenver
303-386Lumen/Level 3LandlineDenver
303-387CenturyLinkLandlineDenver
303-388CenturyLinkLandlineDenver
303-389CenturyLinkLandlineDenver
303-390MCI/VerizonWirelessDenver
303-391CenturyLinkLandlineDenver
303-392Verizon WirelessWirelessDenver
303-393CenturyLinkLandlineDenver
303-394CenturyLinkLandlineDenver
303-395Lumen/Level 3LandlineDenver
303-396Live Wire NetworksLandlineDenver
303-397CenturyLinkLandlineDenver
303-398CenturyLinkLandlineDenver
303-399CenturyLinkLandlineDenver
303-400CenturyLinkLandlineDenver
303-401CenturyLinkLandlineDenver
303-402CenturyLinkLandlineDenver
303-403CenturyLinkLandlineDenver
303-404CenturyLinkLandlineDenver
303-405CenturyLinkLandlineDenver
303-406Lumen/Level 3LandlineDenver
303-407OnvoyLandlineDenver
303-408AT&T MobilityWirelessDenver
303-409Lumen/Level 3LandlineDenver
303-410CenturyLinkLandlineDenver
303-411Multiple Ocn ListingLandlineXxxxxxxxxx
303-412CenturyLinkLandlineDenver
303-413CenturyLinkLandlineDenver
303-414Lumen/Level 3LandlineDenver
303-415CenturyLinkLandlineDenver
303-416Lumen/Level 3LandlineDenver
303-417CenturyLinkLandlineDenver
303-418Lumen/Level 3LandlineDenver
303-419T-MobileWirelessDenver
303-420CenturyLinkLandlineDenver
303-421CenturyLinkLandlineDenver
303-422CenturyLinkLandlineDenver
303-423CenturyLinkLandlineDenver
303-424CenturyLinkLandlineDenver
303-425CenturyLinkLandlineDenver
303-426CenturyLinkLandlineDenver
303-427CenturyLinkLandlineDenver
303-428CenturyLinkLandlineDenver
303-429CenturyLinkLandlineDenver
303-430CenturyLinkLandlineDenver
303-431CenturyLinkLandlineDenver
303-432CenturyLinkLandlineDenver
303-433CenturyLinkLandlineDenver
303-434T-MobileWirelessDenver
303-435T-MobileWirelessDenver
303-436CenturyLinkLandlineDenver
303-437T-MobileWirelessDenver
303-438CenturyLinkLandlineDenver
303-439CenturyLinkLandlineDenver
303-440CenturyLinkLandlineDenver
303-441CenturyLinkLandlineDenver
303-442CenturyLinkLandlineDenver
303-443CenturyLinkLandlineDenver
303-444CenturyLinkLandlineDenver
303-445CenturyLinkLandlineDenver
303-446CenturyLinkLandlineDenver
303-447CenturyLinkLandlineDenver
303-448CenturyLinkLandlineDenver
303-449CenturyLinkLandlineDenver
303-450CenturyLinkLandlineDenver
303-451CenturyLinkLandlineDenver
303-452CenturyLinkLandlineDenver
303-453CenturyLinkLandlineDenver
303-454CenturyLinkLandlineDenver
303-455CenturyLinkLandlineDenver
303-456CenturyLinkLandlineDenver
303-457CenturyLinkLandlineDenver
303-458CenturyLinkLandlineDenver
303-459CenturyLinkLandlineDenver
303-460CenturyLinkLandlineDenver
303-461Usa Mobility WirelessWirelessDenver
303-462CenturyLinkLandlineDenver
303-463CenturyLinkLandlineDenver
303-464CenturyLinkLandlineDenver
303-465CenturyLinkLandlineDenver
303-466CenturyLinkLandlineDenver
303-467CenturyLinkLandlineDenver
303-468OnvoyLandlineDenver
303-469CenturyLinkLandlineDenver
303-470CenturyLinkLandlineDenver
303-471CenturyLinkLandlineDenver
303-472T-MobileWirelessDenver
303-473CenturyLinkLandlineDenver
303-474Teleport Communications AmericaLandlineDenver
303-475AT&T MobilityWirelessDenver
303-476MCI/VerizonWirelessDenver
303-477CenturyLinkLandlineDenver
303-478AT&T MobilityWirelessDenver
303-479Teleport Communications AmericaLandlineDenver
303-480CenturyLinkLandlineDenver
303-481MCI/VerizonWirelessDenver
303-482Lumen/Level 3LandlineDenver
303-483Lumen/Level 3LandlineDenver
303-484Teleport Communications AmericaLandlineDenver
303-485CenturyLinkLandlineLongmont
303-486CenturyLinkLandlineDenver
303-487CenturyLinkLandlineDenver
303-488CenturyLinkLandlineDenver
303-489Verizon WirelessWirelessDenver
303-490Usa Mobility WirelessWirelessDenver
303-491SpectrumLandlineDenver
303-492CenturyLinkLandlineDenver
303-493Lumen/Level 3LandlineDenver
303-494CenturyLinkLandlineDenver
303-495MCI/VerizonWirelessDenver
303-496MCI/VerizonWirelessDenver
303-497CenturyLinkLandlineDenver
303-498ComcastLandlineDenver
303-499CenturyLinkLandlineDenver
303-500Lumen/Level 3LandlineHudson
303-501Verizon WirelessWirelessDenver
303-502Verizon WirelessWirelessFortlupton
303-503Verizon WirelessWirelessDenver
303-504CenturyLinkLandlineDenver
303-505T-MobileWirelessDenver
303-506AT&T MobilityWirelessFortlupton
303-507T-MobileWirelessDenver
303-508American Messaging ServicesLandlineDenver
303-509American Messaging ServicesLandlineDenver
303-510American Messaging ServicesLandlineDenver
303-511Multiple Ocn ListingLandlineXxxxxxxxxx
303-512CenturyLinkLandlineDenver
303-513AT&T MobilityWirelessDenver
303-514Verizon WirelessWirelessDenver
303-515OnvoyLandlineDenver
303-516CenturyLinkLandlineDenver
303-517AT&T MobilityWirelessDenver
303-518Verizon WirelessWirelessDenver
303-519Verizon WirelessWirelessDenver
303-520T-MobileWirelessDenver
303-521T-MobileWirelessDenver
303-522T-MobileWirelessDenver
303-523T-MobileWirelessDenver
303-524Teleport Communications AmericaLandlineDenver
303-525T-MobileWirelessDenver
303-526CenturyLinkLandlineDenver
303-527CenturyLinkLandlineDenver
303-528American Messaging ServicesLandlineDenver
303-529OnvoyLandlineDenver
303-530CenturyLinkLandlineDenver
303-531MCI/VerizonWirelessDenver
303-532Paetec ItelLandlineLongmont
303-533CenturyLinkLandlineDenver
303-534CenturyLinkLandlineDenver
303-535OnvoyLandlineFortlupton
303-536CenturyLinkLandlineHudson
303-537Teleport Communications AmericaLandlineDenver
303-538CenturyLinkLandlineDenver
303-539MCI/VerizonWirelessDenver
303-540Usa Mobility WirelessWirelessDenver
303-541CenturyLinkLandlineDenver
303-542MCI/VerizonWirelessDenver
303-543CenturyLinkLandlineDenver
303-544CenturyLinkLandlineDenver
303-545CenturyLinkLandlineDenver
303-546CenturyLinkLandlineDenver
303-547Lumen/Level 3LandlineDenver
303-548Verizon WirelessWirelessDenver
303-549Verizon WirelessWirelessDenver
303-550Verizon WirelessWirelessDenver
303-551MCI/VerizonWirelessDenver
303-552Lumen/Level 3LandlineDenver
303-553Usa Mobility WirelessWirelessDenver
303-554CenturyLinkLandlineDenver
303-555Multiple Ocn ListingLandlineDir Asst
303-556CenturyLinkLandlineDenver
303-557Lumen/Level 3LandlineDenver
303-558Lumen/Level 3LandlineDenver
303-559American Messaging ServicesLandlineDenver
303-560Usa Mobility WirelessWirelessDenver
303-561CenturyLinkLandlineDenver
303-562Lumen/Level 3LandlineDenver
303-563Lumen/Level 3LandlineDenver
303-564T-MobileWirelessDenver
303-565OnvoyLandlineDenver
303-566MCI/VerizonWirelessDenver
303-567CenturyLinkLandlineDenver
303-568Teleport Communications AmericaLandlineDenver
303-569CenturyLinkLandlineGeorgetown
303-570AT&T MobilityWirelessDenver
303-571CenturyLinkLandlineDenver
303-572CenturyLinkLandlineDenver
303-573CenturyLinkLandlineDenver
303-574CenturyLinkLandlineDenver
303-575CenturyLinkLandlineDenver
303-576CenturyLinkLandlineDenver
303-577Electric LightwaveLandlineDenver
303-578Lumen/Level 3LandlineKeenesburg
303-579Verizon WirelessWirelessDenver
303-580American Messaging ServicesLandlineDenver
303-581CenturyLinkLandlineDenver
303-582CenturyLinkLandlineDenver
303-583Teleport Communications AmericaLandlineDenver
303-584CenturyLinkLandlineDenver
303-585CenturyLinkLandlineDenver
303-586Lumen/Level 3LandlineDenver
303-587T-MobileWirelessDenver
303-588AT&T MobilityWirelessDenver
303-589AT&T MobilityWirelessDenver
303-590Lumen/Level 3LandlineDenver
303-591T-MobileWirelessDenver
303-592CenturyLinkLandlineDenver
303-593Teleport Communications AmericaLandlineDenver
303-594Verizon WirelessWirelessDenver
303-595CenturyLinkLandlineDenver
303-596T-MobileWirelessDenver
303-597Electric LightwaveLandlineDenver
303-598T-MobileWirelessDenver
303-599Usa Mobility WirelessWirelessDenver
303-600Teleport Communications AmericaLandlineDenver
303-601AT&T MobilityWirelessDenver
303-602CenturyLinkLandlineDenver
303-603CenturyLinkLandlineDenver
303-604CenturyLinkLandlineDenver
303-605CenturyLinkLandlineDenver
303-606CenturyLinkLandlineDenver
303-607CenturyLinkLandlineDenver
303-608CenturyLinkLandlineDenver
303-609Usa Mobility WirelessWirelessDenver
303-610Usa Mobility WirelessWirelessDenver
303-611Multiple Ocn ListingLandlineXxxxxxxxxx
303-612Usa Mobility WirelessWirelessDenver
303-613Usa Mobility WirelessWirelessDenver
303-614CenturyLinkLandlineDenver
303-615CenturyLinkLandlineDenver
303-616SpectrumLandlineKeenesburg
303-617CenturyLinkLandlineDenver
303-618AT&T MobilityWirelessDenver
303-619AT&T MobilityWirelessDenver
303-620CenturyLinkLandlineDenver
303-621CenturyLinkLandlineDenver
303-622Strasburg Tel. CoLandlineStrasburg
303-623CenturyLinkLandlineDenver
303-624CenturyLinkLandlineDenver
303-625Lumen/Level 3LandlineDenver
303-626CenturyLinkLandlineDenver
303-627CenturyLinkLandlineDenver
303-628CenturyLinkLandlineDenver
303-629CenturyLinkLandlineDenver
303-630CenturyLinkLandlineDenver
303-631CenturyLinkLandlineDenver
303-632Teleport Communications AmericaLandlineDenver
303-633CenturyLinkLandlineDenver
303-634CenturyLinkLandlineDenver
303-635CenturyLinkLandlineDenver
303-636CenturyLinkLandlineDenver
303-637CenturyLinkLandlineDenver
303-638AT&T MobilityWirelessDenver
303-639CenturyLinkLandlineDenver
303-640CenturyLinkLandlineDenver
303-641T-MobileWirelessDenver
303-642CenturyLinkLandlineDenver
303-643CenturyLinkLandlineDenver
303-644Eastern Slope Rural Tel. AssnLandlineBennett
303-645CenturyLinkLandlineDenver
303-646CenturyLinkLandlineDenver
303-647CenturyLinkLandlineDeckers
303-648CenturyLinkLandlineDenver
303-649CenturyLinkLandlineDenver
303-650CenturyLinkLandlineDenver
303-651CenturyLinkLandlineLongmont
303-652CenturyLinkLandlineLongmont
303-653Lumen/Level 3LandlineDenver
303-654CenturyLinkLandlineDenver
303-655CenturyLinkLandlineDenver
303-656Verizon WirelessWirelessDenver
303-657CenturyLinkLandlineDenver
303-658CenturyLinkLandlineDenver
303-659CenturyLinkLandlineDenver
303-660CenturyLinkLandlineDenver
303-661CenturyLinkLandlineDenver
303-662CenturyLinkLandlineDenver
303-663CenturyLinkLandlineDenver
303-664CenturyLinkLandlineDenver
303-665CenturyLinkLandlineDenver
303-666CenturyLinkLandlineDenver
303-667T-MobileWirelessDenver
303-668T-MobileWirelessDenver
303-669T-MobileWirelessDenver
303-670CenturyLinkLandlineDenver
303-671CenturyLinkLandlineDenver
303-672CenturyLinkLandlineDenver
303-673CenturyLinkLandlineDenver
303-674CenturyLinkLandlineDenver
303-675CenturyLinkLandlineDenver
303-676CenturyLinkLandlineDenver
303-677CenturyLinkLandlineDenver
303-678CenturyLinkLandlineLongmont
303-679CenturyLinkLandlineDenver
303-680CenturyLinkLandlineDenver
303-681CenturyLinkLandlineDenver
303-682CenturyLinkLandlineLongmont
303-683CenturyLinkLandlineDenver
303-684CenturyLinkLandlineLongmont
303-685CenturyLinkLandlineDenver
303-686Usa Mobility WirelessWirelessDenver
303-687Usa Mobility WirelessWirelessDenver
303-688CenturyLinkLandlineDenver
303-689CenturyLinkLandlineDenver
303-690CenturyLinkLandlineDenver
303-691CenturyLinkLandlineDenver
303-692CenturyLinkLandlineDenver
303-693CenturyLinkLandlineDenver
303-694CenturyLinkLandlineDenver
303-695CenturyLinkLandlineDenver
303-696CenturyLinkLandlineDenver
303-697CenturyLinkLandlineDenver
303-698CenturyLinkLandlineDenver
303-699CenturyLinkLandlineDenver
303-700Landline
303-701Communications UnlimitedLandlineDenver
303-702CenturyLinkLandlineLongmont
303-703CenturyLinkLandlineDenver
303-704MCI/VerizonWirelessDenver
303-705CenturyLinkLandlineDenver
303-706CenturyLinkLandlineDenver
303-707CenturyLinkLandlineDenver
303-708CenturyLinkLandlineDenver
303-709Verizon WirelessWirelessLongmont
303-710Verizon WirelessWirelessFortlupton
303-711Multiple Ocn ListingLandlineXxxxxxxxxx
303-712CenturyLinkLandlineDenver
303-713CenturyLinkLandlineDenver
303-714CenturyLinkLandlineDenver
303-715CenturyLinkLandlineDenver
303-716CenturyLinkLandlineDenver
303-717AT&T MobilityWirelessFortlupton
303-718Verizon WirelessWirelessFortlupton
303-719Lumen/Level 3LandlineDeer Trail
303-720Verizon WirelessWirelessFortlupton
303-721CenturyLinkLandlineDenver
303-722CenturyLinkLandlineDenver
303-723Teleport Communications AmericaLandlineDenver
303-724CenturyLinkLandlineDenver
303-725T-MobileWirelessDenver
303-726Verizon WirelessWirelessDenver
303-727CenturyLinkLandlineDenver
303-728Teleport Communications AmericaLandlineDenver
303-729MCI/VerizonWirelessDenver
303-730CenturyLinkLandlineDenver
303-731Lumen/Level 3LandlineDenver
303-732CenturyLinkLandlineKeenesburg
303-733CenturyLinkLandlineDenver
303-734CenturyLinkLandlineDenver
303-735CenturyLinkLandlineDenver
303-736Teleport Communications AmericaLandlineDenver
303-737CenturyLinkLandlineDenver
303-738CenturyLinkLandlineDenver
303-739CenturyLinkLandlineDenver
303-740CenturyLinkLandlineDenver
303-741CenturyLinkLandlineDenver
303-742CenturyLinkLandlineDenver
303-743CenturyLinkLandlineDenver
303-744CenturyLinkLandlineDenver
303-745CenturyLinkLandlineDenver
303-746Verizon WirelessWirelessLongmont
303-747CenturyLinkLandlineAllnspklyn
303-748AT&T MobilityWirelessDenver
303-749Teleport Communications AmericaLandlineDenver
303-750CenturyLinkLandlineDenver
303-751CenturyLinkLandlineDenver
303-752CenturyLinkLandlineDenver
303-753CenturyLinkLandlineDenver
303-754CenturyLinkLandlineDenver
303-755CenturyLinkLandlineDenver
303-756CenturyLinkLandlineDenver
303-757CenturyLinkLandlineDenver
303-758CenturyLinkLandlineDenver
303-759CenturyLinkLandlineDenver
303-760Usa Mobility WirelessWirelessDenver
303-761CenturyLinkLandlineDenver
303-762CenturyLinkLandlineDenver
303-763CenturyLinkLandlineDenver
303-764CenturyLinkLandlineDenver
303-765CenturyLinkLandlineDenver
303-766CenturyLinkLandlineDenver
303-767American Messaging ServicesLandlineDenver
303-768CenturyLinkLandlineDenver
303-769Bijou Tel. Coop. AssnLandlineDeer Trail
303-770CenturyLinkLandlineDenver
303-771CenturyLinkLandlineDenver
303-772CenturyLinkLandlineLongmont
303-773CenturyLinkLandlineDenver
303-774CenturyLinkLandlineLongmont
303-775Verizon WirelessWirelessLongmont
303-776CenturyLinkLandlineLongmont
303-777CenturyLinkLandlineDenver
303-778CenturyLinkLandlineDenver
303-779CenturyLinkLandlineDenver
303-780CenturyLinkLandlineDenver
303-781CenturyLinkLandlineDenver
303-782CenturyLinkLandlineDenver
303-783CenturyLinkLandlineDenver
303-784CenturyLinkLandlineDenver
303-785MCI/VerizonWirelessDenver
303-786CenturyLinkLandlineDenver
303-787CenturyLinkLandlineDenver
303-788CenturyLinkLandlineDenver
303-789CenturyLinkLandlineDenver
303-790CenturyLinkLandlineDenver
303-791CenturyLinkLandlineDenver
303-792CenturyLinkLandlineDenver
303-793CenturyLinkLandlineDenver
303-794CenturyLinkLandlineDenver
303-795CenturyLinkLandlineDenver
303-796CenturyLinkLandlineDenver
303-797CenturyLinkLandlineDenver
303-798CenturyLinkLandlineDenver
303-799CenturyLinkLandlineDenver
303-800Lumen/Level 3LandlineDenver
303-801MCI/VerizonWirelessDenver
303-802Lumen/Level 3LandlineDenver
303-803Lumen/Level 3LandlineDenver
303-804CenturyLinkLandlineDenver
303-805CenturyLinkLandlineDenver
303-806CenturyLinkLandlineDenver
303-807AT&T MobilityWirelessDenver
303-808AT&T MobilityWirelessDenver
303-809AT&T MobilityWirelessDenver
303-810AT&T MobilityWirelessDenver
303-811Multiple Ocn ListingLandlineXxxxxxxxxx
303-812CenturyLinkLandlineDenver
303-813CenturyLinkLandlineDenver
303-814CenturyLinkLandlineDenver
303-815Interlink Adv SvcLandlineDenver
303-816CenturyLinkLandlineDeckers
303-817Verizon WirelessWirelessDenver
303-818Verizon WirelessWirelessDenver
303-819Verizon WirelessWirelessDenver
303-820CenturyLinkLandlineDenver
303-821Usa Mobility WirelessWirelessDenver
303-822Bijou Tel. Coop. AssnLandlineByers
303-823CenturyLinkLandlineAllnspklyn
303-824Teleport Communications AmericaLandlineDenver
303-825CenturyLinkLandlineDenver
303-826Usa Mobility WirelessWirelessDenver
303-827Lumen/Level 3LandlineLongmont
303-828CenturyLinkLandlineDenver
303-829Verizon WirelessWirelessDenver
303-830CenturyLinkLandlineDenver
303-831CenturyLinkLandlineDenver
303-832CenturyLinkLandlineDenver
303-833CenturyLinkLandlineDenver
303-834Verizon WirelessWirelessLongmont
303-835Lumen/Level 3LandlineDenver
303-836Communications UnlimitedLandlineDenver
303-837CenturyLinkLandlineDenver
303-838CenturyLinkLandlineDeckers
303-839CenturyLinkLandlineDenver
303-840CenturyLinkLandlineDenver
303-841CenturyLinkLandlineDenver
303-842Verizon WirelessWirelessDenver
303-843CenturyLinkLandlineDenver
303-844CenturyLinkLandlineDenver
303-845Teleport Communications AmericaLandlineLongmont
303-846CenturyLinkLandlineDenver
303-847Lumen/Level 3LandlineDenver
303-848Lumen/Level 3LandlineLongmont
303-849Roggen Tel. Coop. CoLandlineRoggen
303-850CenturyLinkLandlineDenver
303-851Usa Mobility WirelessWirelessDenver
303-852Usa Mobility WirelessWirelessDenver
303-853CenturyLinkLandlineDenver
303-854Lumen/Level 3LandlineDenver
303-855Usa Mobility WirelessWirelessDenver
303-856Lumen/Level 3LandlineDenver
303-857CenturyLinkLandlineFortlupton
303-858CenturyLinkLandlineDenver
303-859Verizon WirelessWirelessDenver
303-860CenturyLinkLandlineDenver
303-861CenturyLinkLandlineDenver
303-862ComcastLandlineDenver
303-863CenturyLinkLandlineDenver
303-864CenturyLinkLandlineDenver
303-865Lumen/Level 3LandlineDenver
303-866CenturyLinkLandlineDenver
303-867IlokaLandlineDenver
303-868Verizon WirelessWirelessDenver
303-869CenturyLinkLandlineDenver
303-870Verizon WirelessWirelessDenver
303-871CenturyLinkLandlineDenver
303-872Lumen/Level 3LandlineDenver
303-873CenturyLinkLandlineDenver
303-874Lumen/Level 3LandlineDenver
303-875T-MobileWirelessDenver
303-876MCI/VerizonWirelessDenver
303-877Verizon WirelessWirelessDenver
303-878Usa Mobility WirelessWirelessDenver
303-879OnvoyLandlineDenver
303-880Verizon WirelessWirelessDenver
303-881AT&T MobilityWirelessDenver
303-882AT&T MobilityWirelessDenver
303-883AT&T MobilityWirelessDenver
303-884AT&T MobilityWirelessDenver
303-885AT&T MobilityWirelessDenver
303-886AT&T MobilityWirelessDenver
303-887AT&T MobilityWirelessDenver
303-888AT&T MobilityWirelessDenver
303-889CenturyLinkLandlineDenver
303-890Usa Mobility WirelessWirelessDenver
303-891Usa Mobility WirelessWirelessDenver
303-892CenturyLinkLandlineDenver
303-893CenturyLinkLandlineDenver
303-894CenturyLinkLandlineDenver
303-895Verizon WirelessWirelessDenver
303-896CenturyLinkLandlineDenver
303-897Usa Mobility WirelessWirelessDenver
303-898AT&T MobilityWirelessDenver
303-899CenturyLinkLandlineDenver
303-900Lumen/Level 3LandlineGeorgetown
303-901T-MobileWirelessDenver
303-902Verizon WirelessWirelessDenver
303-903Verizon WirelessWirelessDenver
303-904CenturyLinkLandlineDenver
303-905Verizon WirelessWirelessDenver
303-906Verizon WirelessWirelessDenver
303-907Verizon WirelessWirelessDenver
303-908Verizon WirelessWirelessDenver
303-909Verizon WirelessWirelessDenver
303-910Verizon WirelessWirelessDenver
303-911Multiple Ocn ListingLandlineXxxxxxxxxx
303-912Verizon WirelessWirelessDenver
303-913Verizon WirelessWirelessDenver
303-914CenturyLinkLandlineDenver
303-915Verizon WirelessWirelessDenver
303-916Verizon WirelessWirelessDenver
303-917Verizon WirelessWirelessDenver
303-918Verizon WirelessWirelessDenver
303-919Verizon WirelessWirelessDenver
303-920CenturyLinkLandlineDenver
303-921Verizon WirelessWirelessDenver
303-922CenturyLinkLandlineDenver
303-923Lumen/Level 3LandlineDenver
303-924CenturyLinkLandlineDenver
303-925CenturyLinkLandlineDenver
303-926CenturyLinkLandlineDenver
303-927Teleport Communications AmericaLandlineDenver
303-928MCI/VerizonWirelessDenver
303-929Verizon WirelessWirelessDenver
303-930CenturyLinkLandlineDenver
303-931T-MobileWirelessDenver
303-932CenturyLinkLandlineDenver
303-933CenturyLinkLandlineDenver
303-934CenturyLinkLandlineDenver
303-935CenturyLinkLandlineDenver
303-936CenturyLinkLandlineDenver
303-937CenturyLinkLandlineDenver
303-938CenturyLinkLandlineDenver
303-939CenturyLinkLandlineDenver
303-940CenturyLinkLandlineDenver
303-941Verizon WirelessWirelessDenver
303-942Teleport Communications AmericaLandlineDenver
303-943Skye TelecomLandlineDenver
303-944T-MobileWirelessDenver
303-945ComcastLandlineDenver
303-946T-MobileWirelessDenver
303-947Verizon WirelessWirelessDenver
303-948CenturyLinkLandlineDenver
303-949T-MobileWirelessDenver
303-950Landline
303-951Lumen/Level 3LandlineDenver
303-952Lumen/Level 3LandlineDenver
303-953Lumen/Level 3LandlineDenver
303-954Lumen/Level 3LandlineDenver
303-955Lumen/Level 3LandlineDenver
303-956AT&T MobilityWirelessFortlupton
303-957Lumen/Level 3LandlineDenver
303-958Landline
303-959Landline
303-960T-MobileWirelessDenver
303-961T-MobileWirelessDenver
303-962OnvoyLandlineDenver
303-963Lumen/Level 3LandlineDenver
303-964CenturyLinkLandlineDenver
303-965CenturyLinkLandlineDenver
303-966CenturyLinkLandlineDenver
303-967CenturyLinkLandlineDenver
303-968MCI/VerizonWirelessDenver
303-969CenturyLinkLandlineDenver
303-970OnvoyLandlineDeckers
303-971CenturyLinkLandlineDenver
303-972CenturyLinkLandlineDenver
303-973CenturyLinkLandlineDenver
303-974Lumen/Level 3LandlineDenver
303-975CenturyLinkLandlineDenver
303-976Landline
303-977CenturyLinkLandlineDenver
303-978CenturyLinkLandlineDenver
303-979CenturyLinkLandlineDenver
303-980CenturyLinkLandlineDenver
303-981Verizon WirelessWirelessDenver
303-982CenturyLinkLandlineDenver
303-983Landline
303-984CenturyLinkLandlineDenver
303-985CenturyLinkLandlineDenver
303-986CenturyLinkLandlineDenver
303-987CenturyLinkLandlineDenver
303-988CenturyLinkLandlineDenver
303-989CenturyLinkLandlineDenver
303-990T-MobileWirelessFortlupton
303-991MCI/VerizonWirelessDenver
303-992CenturyLinkLandlineDenver
303-993OnvoyLandlineDenver
303-994T-MobileWirelessDenver
303-995T-MobileWirelessDenver
303-996Electric LightwaveLandlineDenver
303-997ComcastLandlineDenver
303-998CenturyLinkLandlineDenver
303-999ComcastLandlineDenver
Overlay Area Codes
720983

All 5 area codes in Colorado

303719720970983

About Area Code 303

Back in 1947, when the phone system was getting a major overhaul after World War II, area code 303 got its start as one of the original codes. That's right, it was there from the beginning, covering what was then a sprawling part of Colorado that included Denver and its growing suburbs. Fast forward to today, and 303 still serves a bunch of cities like Arvada, Aurora, and Boulder, connecting about 18 communities in total. Imagine picking up the phone and hearing that familiar ring from the Mile High City, where the Rocky Mountains loom in the background and folks are always on the go. This code overlays with 720 and 983 now, which means more numbers for the area's booming population, but 303 keeps its charm as the original. It's all about that mix of urban energy in Denver and the quieter vibes in places like Englewood or Broomfield. You'll find everything from tech hubs to outdoor adventures here, and it's no surprise that calls from 303 often carry a hint of that Colorado spirit—friendly, straightforward, and ready for whatever comes next. Whether you're chatting with a neighbor in Centennial or coordinating a hike in Boulder, this code has been linking lives for over 75 years, evolving right alongside the state it calls home.

⚠ Scam & Spam Alert for 303

If you're in the 303 area, you might get calls that seem off, like someone claiming to be from the IRS demanding payment right away or pushing you to buy a new auto warranty that you never signed up for. Utility scams are another headache around here, with fraudsters pretending to be from your electric company and threatening to cut off service unless you pay up fast. Then there's Medicare fraud, where scammers offer fake services or ask for your personal details under the guise of helping with benefits. These tricks can hit anyone, so it's smart to stay alert. Remember, legitimate organizations won't ask for sensitive info over the phone. A simple tip: Always hang up and call back using a number you trust, like the one on your official statements, to verify before you respond.

Local Snapshot

Denver's metro area packs in over 2.9 million people, making it a real hub in the Rockies. That population keeps growing, drawn by the mix of city life and nearby mountains. The economy here runs on key industries like aerospace, tech, and outdoor gear, with companies like Lockheed Martin and REI calling Colorado home. It's no wonder jobs in these fields are everywhere. The state is famous for its craft breweries, with Denver alone haveing hundreds of spots to grab a local beer after a ski trip. And here's a kicker: Colorado has more microbreweries per capita than anywhere else in the U.S. Oh, and if you're into sports, the Broncos and Nuggets keep things exciting year-round.

Frequently Asked Questions

Where is area code 303?
Area code 303 serves Denver and surrounding communities in Colorado, including Arvada, Aurora, Boulder, Brighton, Broomfield and 13 more. It is in the Mountain time zone.
What cities are in area code 303?
Area code 303 covers 18 cities in Colorado: Arvada, Aurora, Boulder, Brighton, Broomfield, Centennial, Denver, Englewood, Erie, Golden, and 8 more
What time zone is 303?
Area code 303 is in the Mountain time zone (UTC-7).
When was area code 303 created?
Area code 303 is one of the original area codes established in 1947 as part of the North American Numbering Plan.
Is 303 a legitimate area code?
Yes, 303 is a valid, active area code assigned to Denver, Colorado. However, scammers can spoof any area code, so receiving a call from 303 doesn't guarantee the caller is actually in this area.
What area codes overlap with 303?
Area code 303 shares its geographic area with overlay codes 720 and 983. This means all local calls in the area require 10-digit dialing.

Has area code 303 ever been split?

Area code 303, established in 1947, was overlaid with 720 in 1994 due to population growth in the Denver area. This change helped manage the increasing number of phone lines in cities like Denver and Aurora. Further overlays such as 983 were added later to handle continued expansion.

What major outdoor activities are linked to the cities in area code 303?

Cities like Boulder and Denver in area code 303 offer easy access to the Rocky Mountains for hiking and skiing. This region's proximity to trails and parks makes it a hub for outdoor enthusiasts year-round. Local events often tie into these activities, influencing community gatherings.

How does the Mountain Time Zone impact daily life in area code 303 cities?

The Mountain Time Zone (UTC-7) in area code 303 means residents in Denver and surrounding areas adjust schedules for daylight saving time, affecting work and school routines. This timezone creates a one-hour difference from Pacific Time, which influences business interactions with western states. It also aligns with seasonal changes that impact local festivals and events.