Area Code 303 - Colorado

Every 303 prefix with its city and carrier. Got a specific number? Search it here.

Area code 303 serves Colorado (Mountain time zone) with 785 assigned prefixes. Major rate centers include Denver, Longmont, Fort Lupton, Deckers, Keenesburg, Allens Park-Lyons, Deer Trail, Georgetown. Received a call from a 303 number? Type the full number into the search box above to see its city, carrier, and community reports.

Prefixes in area code 303

PrefixCityStateCarrier
303-963DenverCOLEVEL 3 COMMUNICATIONS, LLC - CO
303-964DenverCOQWEST CORPORATION
303-965DenverCOQWEST CORPORATION
303-966DenverCOQWEST CORPORATION
303-967DenverCOQWEST CORPORATION
303-968DenverCOMCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-969DenverCOQWEST CORPORATION
303-970DeckersCOONVOY, LLC - CO
303-971DenverCOQWEST CORPORATION
303-972DenverCOQWEST CORPORATION
303-973DenverCOQWEST CORPORATION
303-974DenverCOLEVEL 3 COMMUNICATIONS, LLC - CO
303-975DenverCOQWEST CORPORATION
303-977DenverCOQWEST CORPORATION
303-978DenverCOQWEST CORPORATION
303-979DenverCOQWEST CORPORATION
303-980DenverCOQWEST CORPORATION
303-981DenverCOCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO
303-982DenverCOQWEST CORPORATION
303-984DenverCOQWEST CORPORATION
303-985DenverCOQWEST CORPORATION
303-986DenverCOQWEST CORPORATION
303-987DenverCOQWEST CORPORATION
303-988DenverCOQWEST CORPORATION
303-989DenverCOQWEST CORPORATION
303-990Fort LuptonCOT-MOBILE USA, INC.
303-991DenverCOMCIMETRO ACCESS TRANSMISSION SERVICES LLC
303-992DenverCOQWEST CORPORATION
303-993DenverCOONVOY, LLC - CO
303-994DenverCOT-MOBILE USA, INC.
303-995DenverCOT-MOBILE USA, INC.
303-996DenverCOELECTRIC LIGHTWAVE LLC DBA ALLSTREAM
303-997DenverCOCOMCAST IP PHONE, LLC
303-998DenverCOQWEST CORPORATION
303-999DenverCOCOMCAST IP PHONE, LLC

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