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Thereareseveraltypesofphonenumbersforlegitimateinternetphoneservices.Themostcommontypesincludetoll-freenumbers,localnumbers,andinternationalnumbers.Toll-freenumbersaretypicallyusedforcustomerserviceorsaleslinesandstartwithaspecificthree-digitprefixsuchas800,888,877,or866.Thesenumbersallowcustomerstocallforfreeandareoftenusedbybusinessestoprovidesupporttotheircustomers.Localnumbersarespecifictoaparticulargeographicareaandareusedbyindividualsorbusinessesinthatarea.Thesenumbersaretypicallyassignedbythephonecompanyandcanbedialedbyanyonewithinthesameareacodewithoutincurringlong-distancecharges.Internationalnumbersareusedformakingcallstoothercountriesandtypicallystartwiththecountrycodefollowedbytheareacodeandlocalnumber.Thesenumbersareessentialforbusinesseswithinternationalclientsorforindividualswhoneedtomakecallsabroad.Overall,thesetypesofphonenumbersareessentialforlegitimateinternetphoneservicestoprovidereliableandconvenientcommunicationoptionsfortheirusers.