Area Code — 240

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Rate centers: WSHNGTNZN2, RIDGE, HAGERSTOWN, WSNGTNZN10, WSNG236Z14, DAMASCS236, LA PLATA, INDIANHEAD, WALDORF, OAKLAND, MECHANCSVL, FREDERICK, NANJEMOY, TOMPKINSVL, POOLESVL, WSNGTNZN11, WSNG236Z13, HUGHESVL, LXTNPKGRML, LEONARDTN, GAITHERSBG, WSNGTNZN16, WSHNGTNZN3, BRANDYWINE, HIGHFIELD, WSHNGTNZN6, LAUREL236, GRANTSVL, FROSTBURG, HANCOCK, THURMONT, WSNGTNZN12, WSHNGTNZN4, WSHNGTNZN5, EMMITSBURG, LAUREL238, MCCOOLE, ASHTON238, WSNG236Z15, BUCKEYSTN, ASHTON236, MYERSVILLE, CUMBERLAND, WILLIAMSPT, MOUNT AIRY, MIDDLETOWN, WSNG238Z14, WSNG238Z13

Companies: BANDWIDTH.COM CLEC, LLC, ALLEGIANCE TELECOM, INC., SPRINT SPECTRUM L.P., PAETEC COMMUNICATIONS, INC., YMAX COMMUNICATIONS CORP., GLOBAL NAPS SOUTH, INC., CELLCO PARTNERSHIP DBA VERIZON WIRELESS, NEW CINGULAR WIRELESS PCS, LLC - DC, LEVEL 3 COMMUNICATIONS, LLC, XO MARYLAND, LLC, RNK, INC., MCI WORLDCOM COMMUNICATIONS, INC., COMCAST PHONE OF NORTHERN MARYLAND, INC., CAVALIER EAST LLC, LIGHTWAVE COMMUNICATIONS, LLC, NATIONSLINE, INC., CORE COMMUNICATIONS, INC., TELCOVE OPERATIONS, INC., AT&T LOCAL, NEXTEL COMMUNICATIONS, INC., OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC, VERIZON MARYLAND, INC., VDL, INC. DBA GLOBAL TELECOM BROKERS, CAVALIER TELEPHONE MID-ATLANTIC, LLC, BROADWING COMMUNICATIONS. LLC, LEAP WIRELESS INTL, INC. DBA CRICKET COMM, INC., GLOBAL CROSSING LOCAL SERVICES, INC., TELEPORT COMMUNICATIONS GROUP, INC. - DC, US LEC OF MARYLAND, INC., IDT AMERICA CORP, STARPOWER COMMUNICATIONS, LLC, CTC COMMUNICATIONS CORP., CBEYOND COMM, LLC MD, TW TELECOM OF MARYLAND LLC, MCIMETRO ACCESS TRANSMISSION SERVICES LLC, USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD, FIBERNET, LLC, SPRINT COMMUNICATIONS COMPANY, L.P., BALTIMORE-WASHINGTON TELEPHONE BWT, TELEPORT COMMUNICATIONS GROUP AMERICA, INC., ATX TELECOMMUNICATIONS SERVICES, LTD, BROADVIEW NETWORKS, INC. - VA, DSLNET COMMUNICATIONS VA, INC., NTELOS NETWORK INC.-VA, NEUTRAL TANDEM-WASHINGTON, DC., LLC - DC, PAETEC COMMUNICATIONS, INC. - DC, TIDALWAVE TELEPHONE INC., MTE, INC. DBA MTE PAGING NETWORK, BROADVIEW NETWORKS, INC., TW TELECOM OF DC LLC - DC

List of 240 Area-Code Phone Number Prefixes

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