DID number is a service offered by telecommunications companies that allows businesses to assign a unique phone number to each of their employees, which can be dialed directly by customers or clients. This enables callers to bypass the receptionist and connect directly with the person they are trying to reach, improving efficiency and reducing call handling times. A DID number could be used by a group of employees as well, with features like IVR, conditional call forwarding and others distributing calls between the employees as a company sees fit. DID number is essential for those who choose to track and analyze call data. It’s useful for performance monitoring and optimization. The cost of the DID numbers varies depending on the phone numbers’ location but is typically charged monthly.