240 Area Code has 474 prefixes

PrefixPrimary CityCarrier
240-200WashingtonBandwidth.com Clec, Llc - Md
240-201WashingtonPeerless Network Of Maryland, Llc
240-203HagerstownSprint Spectrum L.p. - Md
240-204Annapolis JunctionCellco Partnership Dba Verizon Wireless - Md
240-205Annapolis JunctionNew Cingular Wireless Pcs, Llc - Dc
240-206WashingtonXo Maryland, Llc
240-207WashingtonCavalier East Llc - Md
240-210BeltsvilleNew Cingular Wireless Pcs, Llc - Dc
240-212FrederickCore Communications, Inc. - Md
240-215IjamsvilleTelcove Operations, Inc. - Md
240-216WashingtonSprint Spectrum L.p.
240-217FrederickOmnipoint Communications Cap Operations, Llc
240-218WashingtonPeerless Network Of Maryland, Llc
240-221RockvilleVerizon Maryland, Inc.
240-222HerndonCavalier Telephone Mid-atlantic, Llc - Md
240-223WashingtonAllegiance Telecom, Inc. - Md
240-224Annapolis JunctionCellco Partnership Dba Verizon Wireless - Md
240-228LaurelVerizon Maryland, Inc.
240-229WashingtonBroadwing Communications. Llc - Md
240-230Global Crossing Local Services, Inc.-md
240-231FrederickCore Communications, Inc. - Md
240-232WashingtonBroadwing Communications. Llc - Md
240-233WashingtonTeleport Communications America, Llc - Dc
240-234WashingtonCellco Partnership Dba Verizon Wireless - Md
240-235Chevy ChasePaetec Communications, Inc. - Md
240-236FrederickVerizon Maryland, Inc.
240-237BeltsvilleTeleport Communications America, Llc - Dc
240-238Chevy ChasePaetec Communications, Inc. - Md
240-239Chevy ChaseCore Communications, Inc. - Md
240-241LanhamStarpower Communications, Llc - Md
240-242LanhamStarpower Communications, Llc - Md
240-243WashingtonAllegiance Telecom, Inc. - Md
240-244WashingtonStarpower Communications, Llc - Md
240-245WashingtonStarpower Communications, Llc - Md
240-246LanhamStarpower Communications, Llc - Md
240-247WashingtonAllegiance Telecom, Inc. - Md
240-248WashingtonPeerless Network Of Maryland, Llc
240-249WashingtonTeleport Communications America, Llc - Dc
240-250WashingtonPeerless Network Of Maryland, Llc
240-251FrederickCore Communications, Inc. - Md
240-252McLeanLevel 3 Communications, Llc - Md
240-253Global Crossing Local Services, Inc.-md
240-254WashingtonTeleport Communications America, Llc - Dc
240-255WashingtonPeerless Network Of Maryland, Llc
240-256WashingtonTeleport Communications America, Llc - Dc
240-257WashingtonTeleport Communications America, Llc - Dc
240-258McLeanTeleport Communications America, Llc - Dc
240-260WashingtonAllegiance Telecom, Inc. - Md
240-262WashingtonSprint Spectrum L.p.
240-263WashingtonSprint Spectrum L.p.
240-264BeltsvilleVerizon Maryland, Inc.
240-265WashingtonSprint Spectrum L.p.
240-270WashingtonCellco Partnership Dba Verizon Wireless - Md
240-271BeltsvilleNew Cingular Wireless Pcs, Llc - Dc
240-272WashingtonSprint Spectrum L.p.
240-273WashingtonBroadwing Communications. Llc - Md
240-274BeltsvilleNew Cingular Wireless Pcs, Llc - Dc
240-275FrederickCore Communications, Inc. - Md
240-276GaithersburgVerizon Maryland, Inc.
240-277WashingtonSprint Spectrum L.p.
240-278Annapolis JunctionCellco Partnership Dba Verizon Wireless - Md
240-279Chevy ChaseCore Communications, Inc. - Md
240-280ManassasComcast Phone Of Northern Maryland, Inc. - Md
240-281BeltsvilleNew Cingular Wireless Pcs, Llc - Dc
240-282WashingtonPeerless Network Of Maryland, Llc
240-283Chevy ChasePaetec Communications, Inc. - Md
240-284HagerstownLevel 3 Communications, Llc - Md
240-285FrederickCellco Partnership Dba Verizon Wireless - Md
240-286WashingtonSprint Spectrum L.p.
240-288HagerstownComcast Phone Of Northern Maryland, Inc. - Md
240-289HerndonCavalier Telephone Mid-atlantic, Llc - Md
240-290WashingtonAllegiance Telecom, Inc. - Md
240-291MonroviaNew Cingular Wireless Pcs, Llc - Dc
240-292McLeanVerizon Maryland, Inc.
240-293McLeanStarpower Communications, Llc - Md
240-294ManassasXo Maryland, Llc
240-295HerndonCavalier Telephone Mid-atlantic, Llc - Md
240-296HerndonCavalier Telephone Mid-atlantic, Llc - Md
240-297McLeanLevel 3 Communications, Llc - Md
240-298WashingtonCellco Partnership Dba Verizon Wireless - Md
240-299WashingtonSprint Spectrum L.p.
240-300WashingtonCellco Partnership Dba Verizon Wireless - Md
240-304WashingtonSprint Spectrum L.p.
240-305WashingtonSprint Spectrum L.p.
240-306WashingtonAllegiance Telecom, Inc. - Md
240-308BeltsvilleNew Cingular Wireless Pcs, Llc - Dc
240-309WashingtonCellco Partnership Dba Verizon Wireless - Md
240-310FrederickUscoc Of Cumberland, Inc. Dba United States Cel Md
240-312HerndonCavalier Telephone Mid-atlantic, Llc - Md
240-313HagerstownVerizon Maryland, Inc.
240-314RockvilleVerizon Maryland, Inc.
240-315FrederickVerizon Maryland, Inc.
240-316WashingtonSprint Spectrum L.p.
240-317LanhamStarpower Communications, Llc - Md
240-318ManassasVerizon Maryland, Inc.
240-319BaltimoreCellco Partnership Dba Verizon Wireless - Md
240-320WashingtonCavalier East Llc - Md
240-321CumberlandUscoc Of Cumberland, Inc. Dba United States Cel Md
240-322FrederickCore Communications, Inc. - Md
240-325Chevy ChaseCore Communications, Inc. - Md