Automatic call-back system and method using data indicating best time to call

A system and method are disclosed for providing an automatic call-back when a calling party encounters a ring-no-answer condition upon calling a called party. An exemplary system includes: a first originating switch node (OSN) coupled to a first originating telephone call location corresponding to a calling party and, a terminating switch node (TSN) coupled to a destination telephone call location corresponding to a called party; a database coupled to the TSN for storing the called party's times of calling activity; a processor coupled to the TSN and to the database for processing the times of calling activity to determine a best time to call (BTTC) the called party (wherein the BTTC comprises a best exact time and/or a window of time) and providing the TSN with the BTTC; a signaling network for routing the BTTC to the OSN; and an adjunct coupled to the OSN for receiving the calling party's automatic call-back request and initiating an automatic call back to the calling party at the BTTC the called party. Upon receiving the automatic call-back request, the adjunct provides the calling party with the BTTC. The adjunct also requests the calling party to enter a time at which the calling party is most likely to be available to receive an automatic call-back and, if the time entered in response to said request is the best exact time or, within the window of time, the adjunct initiates an automatic call-back to said calling party at the time entered.