A digital radio telephone comprises a radio portion for receiving a radio signal modulated by an encoded digital signal including control information, for demodulating and outputting the encoded digital signal, a control signal processing portion for decoding the demodulated encoded digital signal to obtain the control information, a telephone number information detecting means for detecting whether the decoded control information includes mate telephone number information, a memory for storing the telephone number information, a time information management means for specifying an incoming time of the telephone number information to output a time information, and a memory management means for recording the telephone number information corresponding to the time information into the memory.