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IntheUnitedStates,thephonenumberforanetworktelephoneistypicallya10-digitnumber.TheformatofaUSphonenumberisusually(XXX)XXX-XXXX,wherethefirstthreedigitsrepresenttheareacode,thenextthreedigitsrepresenttheexchangecode,andthefinalfourdigitsrepresentthesubscribernumber.WhenmakingacallwithintheUnitedStatesusinganetworktelephone,youwouldneedtodialthefull10-digitphonenumber,includingtheareacode.Forexample,ifyouwerecallingafriendinNewYorkCity,youwoulddial(212)555-1234.IfyouarecallingfromoutsidetheUnitedStates,youwouldneedtodialtheinternationaldialingcodefortheUS,whichis+1,followedbythe10-digitphonenumber.So,forthesameNewYorkCitynumber,youwoulddial+1(212)555-1234.Overall,thephonenumberformatforanetworktelephoneintheUnitedStatesisa10-digitnumber,anditisimportanttoincludetheareacodewhenmakingacallwithinthecountry.