A virtual number, also known as direct inward dialing or access numbers, is a telephone number without a directly associated telephone line. Usually, these numbers are programmed to forward incoming calls to one of the pre-set telephone numbers, chosen by the client: fixed, mobile or VoIP. A virtual number can work like a gateway between traditional calls and VoIP. Subscribers to virtual numbers may use their existing phones, without the need to purchase additional hardware, i.e. use the numerous available software. A virtual private number is a telephone number that forwards incoming calls to any of a number of pre-set telephone numbers. These are also called a follow-me number, a virtual telephone number or Personal Number. Usually a virtual telephone number can be set to forward calls to different telephone numbers depending on the time of day and the day of the week using time of day routing; for example, between 9 and 5 on working days incoming calls will be forwarded to one's workplace, but in the weekends to one's cellphone. The availability of virtual phone numbers are subject to the regulatory situation in the issuing country.
Applications and example of use
Businesses – A company located in China can have a phone number in Los Angeles or London without paying for a fixed foreign exchange line. Virtual numbers are very popular among call centers which appear to be located in one country, when they are in one or more countries in different time zone, delivering efficient 24/7 cover.
Individuals – Other popular users of international virtual numbers are migrants and travelers, who appreciate that their friends and family back home can contact them using a local call.
Specific businesses – Calling cards or callback. Virtual numbers work like access numbers, e.g., the phone number that or callback's user has to dial to make the call/.
Marketing – Some companies use virtual numbers for various marketing campaigns, or different media channels; this allows them to track which campaign or medium brings what kind of traffic.
Virtual services – Various providers of virtual business services will use a virtual number to tie in their other virtual services together. This allows their customers to have a phone, address and voice presence almost anywhere in the world.
