A feature of VoIP that allows you to attach additional phone numbers with different area codes to your basic VoIP service. This feature allows people to phone you without incurring long-distance charges from the same or adjacent nontoll area codes. All outgoing calls, however, are billed as if coming from your main phone number. Virtual phone numbers typically each cost a few extra dollars per month.
A Virtual Phone Number or Virtual Number, is a telephone number without an associated phone line. Usually these numbers are programmed to be forwarded to either a Voice over IP service, or to a different phone line, fixed or mobile.