303 Area Code has 770 prefixes

PrefixPrimary CityCarrier
303-200AuroraTeleport Communications America, Llc - Co
303-201DenverUsa Mobility Wireless, Inc.
303-202DenverQwest Corporation
303-203EnglewoodAmerican Messaging Services, Llc
303-204EnglewoodCellco Partnership Dba Verizon Wireless - Co
303-205DenverQwest Corporation
303-206DenverUsa Mobility Wireless, Inc.
303-207DenverUsa Mobility Wireless, Inc.
303-208DenverUsa Mobility Wireless, Inc.
303-209DenverMcimetro Access Transmission Services Llc
303-210EnglewoodSprint Spectrum L.p.
303-212EnglewoodContact Paging Of Colorado, Inc.
303-213DenverUsa Mobility Wireless, Inc.
303-214DenverMcimetro Access Transmission Services Llc
303-215GoldenQwest Corporation
303-216GoldenQwest Corporation
303-217DenverMcimetro Access Transmission Services Llc
303-218DenverMcimetro Access Transmission Services Llc
303-219DenverMcimetro Access Transmission Services Llc
303-220EnglewoodQwest Corporation
303-221EnglewoodQwest Corporation
303-222DenverMcimetro Access Transmission Services Llc
303-223DenverGlobal Crossing Local Services, Inc.-co
303-224EnglewoodQwest Corporation
303-225DenverGlobal Crossing Local Services, Inc.-co
303-226DenverIcg Telecom Group - Co
303-227Commerce CityQwest Corporation
303-228DenverIcg Telecom Group - Co
303-229EnglewoodCellco Partnership Dba Verizon Wireless - Co
303-230DenverUsa Mobility Wireless, Inc.
303-231DenverQwest Corporation
303-232DenverQwest Corporation
303-233DenverQwest Corporation
303-234DenverQwest Corporation
303-235DenverQwest Corporation
303-236DenverQwest Corporation
303-237DenverQwest Corporation
303-238DenverQwest Corporation
303-239DenverQwest Corporation
303-240DenverUsa Mobility Wireless, Inc.
303-241WestminsterCellco Partnership Dba Verizon Wireless - Co
303-242WestminsterMcimetro Access Transmission Services Llc
303-243Fort MorganN.e. Colorado Cellular, Inc.
303-244DenverQwest Corporation
303-245BoulderQwest Corporation
303-246EnglewoodSprint Spectrum L.p.
303-247BoulderQwest Corporation
303-248AuroraTeleport Communications America, Llc - Co
303-249DenverNew Cingular Wireless Pcs, Llc
303-250DenverNew Cingular Wireless Pcs, Llc
303-251DenverUsa Mobility Wireless, Inc.
303-252DenverQwest Corporation
303-253AuroraTeleport Communications America, Llc - Co
303-254DenverQwest Corporation
303-255DenverQwest Corporation
303-256AuroraTeleport Communications America, Llc - Co
303-257EnglewoodSprint Spectrum L.p.
303-258NederlandQwest Corporation
303-259EnglewoodAmerican Messaging Services, Llc
303-260DenverQwest Corporation
303-261AuroraQwest Corporation
303-262DenverAt&t Local
303-263WestminsterCellco Partnership Dba Verizon Wireless - Co
303-264AuroraTeleport Communications America, Llc - Co
303-265EnglewoodQwest Corporation
303-266DenverUsa Mobility Wireless, Inc.
303-267EnglewoodQwest Corporation
303-268DenverIcg Telecom Group - Co
303-269AuroraQwest Corporation
303-270DenverQwest Corporation
303-271GoldenQwest Corporation
303-273GoldenQwest Corporation
303-274DenverQwest Corporation
303-275DenverQwest Corporation
303-276EnglewoodConvergent Communications, Inc. - Co
303-277GoldenQwest Corporation
303-278GoldenQwest Corporation
303-279GoldenQwest Corporation
303-280DenverQwest Corporation
303-281DenverQwest Corporation
303-282DenverQwest Corporation
303-283AuroraQwest Corporation
303-284DenverComcast Phone Of Colorado, Llc - Co
303-285DenverIcg Telecom Group - Co
303-286Commerce CityQwest Corporation
303-287Commerce CityQwest Corporation
303-288Commerce CityQwest Corporation
303-289Commerce CityQwest Corporation
303-290EnglewoodQwest Corporation
303-291DenverQwest Corporation
303-292DenverQwest Corporation
303-293DenverQwest Corporation
303-294DenverQwest Corporation
303-295DenverQwest Corporation
303-296DenverQwest Corporation
303-297DenverQwest Corporation
303-298DenverQwest Corporation
303-299DenverQwest Corporation
303-300DenverQwest Corporation
303-301DenverIcg Telecom Group - Co
303-302EnglewoodXo Colorado, Llc
303-304DenverNew Cingular Wireless Pcs, Llc
303-305DenverMcimetro Access Transmission Services Llc
303-306AuroraQwest Corporation
303-307DenverQwest Corporation
303-308DenverQwest Corporation
303-309DenverGlobal Crossing Local Services, Inc.-co
303-310EnglewoodContact Paging Of Colorado, Inc.
303-312DenverQwest Corporation
303-313DenverQwest Corporation
303-314DenverQwest Corp.
303-316DenverQwest Corporation
303-317EnglewoodQwest Corporation
303-318DenverQwest Corporation
303-319DenverElbert County Wireless, Llc
303-320DenverQwest Corporation
303-321DenverQwest Corporation
303-322DenverQwest Corporation
303-323DenverMcimetro Access Transmission Services Llc
303-324DenverNew Cingular Wireless Pcs, Llc
303-325DenverIcg Telecom Group - Co
303-326AuroraQwest Corporation
303-327DenverIcg Telecom Group - Co
303-328DenverMcimetro Access Transmission Services Llc
303-329DenverQwest Corporation
303-330DenverOnvoy, Llc - Co
303-331DenverQwest Corporation
303-332DenverT-mobile Usa, Inc.
303-333DenverQwest Corporation
303-335WestminsterCellco Partnership Dba Verizon Wireless - Co
303-336DenverQwest Corporation
303-337AuroraQwest Corporation
303-338AuroraQwest Corporation
303-339DenverCbeyond Communications, Llc - Co
303-340AuroraQwest Corporation
303-341AuroraQwest Corporation
303-342DenverQwest Corporation
303-343AuroraQwest Corporation
303-344AuroraQwest Corporation
303-345WestminsterIcg Telecom Group - Co
303-346LittletonQwest Corporation
303-347LittletonQwest Corporation
303-348DenverQwest Corporation
303-349EnglewoodCellco Partnership Dba Verizon Wireless - Co
303-350DenverNew Cingular Wireless Pcs, Llc
303-351EnglewoodOnvoy, Llc - Co
303-352DenverQwest Corporation
303-353DenverComcast Phone Of Colorado, Llc - Co
303-354DenverTeleport Communications America, Llc - Co
303-355DenverQwest Corporation
303-356EnglewoodSprint Spectrum L.p.
303-357DenverMcimetro Access Transmission Services Llc
303-358EnglewoodCellco Partnership Dba Verizon Wireless - Co
303-359DenverT-mobile Usa, Inc.
303-360AuroraQwest Corporation
303-361AuroraQwest Corporation
303-362AuroraTeleport Communications America, Llc - Co
303-363AuroraQwest Corporation
303-364AuroraQwest Corporation
303-365AuroraQwest Corporation
303-366AuroraQwest Corporation
303-367AuroraQwest Corporation
303-368AuroraQwest Corporation
303-369AuroraQwest Corporation
303-370DenverQwest Corporation
303-371DenverQwest Corporation
303-372DenverQwest Corporation
303-373DenverQwest Corporation
303-374AuroraTeleport Communications America, Llc - Co
303-375DenverQwest Corporation
303-376DenverIcg Telecom Group - Co
303-377DenverQwest Corporation
303-378DenverNew Cingular Wireless Pcs, Llc
303-379AuroraTeleport Communications America, Llc - Co
303-380DenverQwest Corporation
303-381DenverIcg Telecom Group - Co
303-382DenverQwest Corporation
303-383DenverQwest Corporation
303-384GoldenQwest Corporation
303-385DenverIcg Telecom Group - Co
303-386DenverIcg Telecom Group - Co
303-387Castle RockQwest Corporation
303-388DenverQwest Corporation
303-389DenverQwest Corporation
303-390DenverMcimetro Access Transmission Services Llc
303-391DenverQwest Corporation
303-392EnglewoodContact Paging Of Colorado, Inc.
303-393DenverQwest Corporation
303-394DenverQwest Corporation
303-395DenverGlobal Crossing Local Services, Inc.-co
303-396DenverLive Wire Networks, Inc. - Co
303-397EnglewoodQwest Corporation
303-398DenverQwest Corporation
303-399DenverQwest Corporation
303-400AuroraQwest Corporation
303-402BoulderQwest Corporation
303-403ArvadaQwest Corporation
303-404BroomfieldQwest Corporation
303-405DenverQwest Corporation
303-406DenverIcg Telecom Group - Co