The concept refers to a secondary or additional telephone number used apart from one’s primary, personal, or business contact number. This can manifest as a virtual number, a temporary number, or a separate physical line. A common example is utilizing a VoIP (Voice over Internet Protocol) service to obtain a number specifically for online transactions or advertising, rather than publishing one’s main number.
The value of such a number lies in its ability to provide enhanced privacy, security, and organizational flexibility. Historically, businesses employed separate lines for various departments. Modern applications extend to individuals seeking to manage their contact information, protect themselves from unwanted solicitations, or maintain a professional image without divulging their primary personal contact details. This offers considerable control over incoming communications.