Full Form of ANI

ANI (Automatic Number Identification) is a service that delivers the number of the calling phone to the receiver of a phone call. The mechanism through which this information is provided is determined by the service provider (such as AT&T, MCI, Sprint, etc.). (1)Rather of manually asking the originating phone number for a phone call, Automatic Number Identification was created to ease the invoicing process for telephone operators. DTMF (multi-frequency digital tone) tones are often sent together with the call to offer the service. AT&T Corporation initially designed ANI for the purpose of internal long-distance pricing. ANI is still in use to handle the invoicing of free phone lines like 1-800, 1-888, and so on.