Virtual number

A virtual number, also known as direct inward dialing (DID) 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 (PSTN) 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 (in the UK) 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 (and acceptable use) of virtual phone numbers are subject to the regulatory situation in the issuing country.

Recently, a new category of service has emerged: virtual mobile phone number. A virtual mobile phone number is a telephone number that is not permanently associated with a physical SIM card or specific mobile device but can be used through a smartphone application. These services allow users to make and receive calls and text messages. In fact, virtual mobile numbers are similar to traditional mobile numbers when it comes to the service that can accessed using them.

Some providers offer real mobile numbers issued through mobile network operators, rather than Voice over Internet Protocol (VoIP) numbers. Real mobile numbers can often be used with services that require SMS verification, such as banking platforms, social media services, and two-factor authentication systems.

Virtual mobile number services are typically accessed through mobile applications that provide calling, messaging, voicemail, and account management features. Many platforms also integrate additional technologies such as embedded SIM (eSIM) support, enabling users to access mobile data networks in multiple countries without requiring a physical SIM card.

Virtual mobile number services are used by international travelers, remote workers, businesses operating across borders, and individuals who wish to maintain multiple phone numbers for privacy or organizational purposes.