1. A playback and communication system, comprising: a playback device for reading information stored in a predetermined region of an information recording medium; and a communication device for establishing a communication line between the playback device and an external device to transmit the information read out by the playback device to the external device via the communication line, wherein the communication device is adapted to receive an answer signal transmitted from the external device, and to transmit the answer signal to the playback device, wherein the playback device is adapted to read out information from a region of the information recording medium other than the predetermined region, based on the answer signal, and wherein the communication device is adapted to transmit identification data of a handler or a buyer, handling or buying the information recording medium, to the external device via the communication line.