COMMUNICATION DEVICE AND STORAGE MEDIUM

The present invention provides a technology capable of performing control such that ranging is performed more reliably in a mobile object and a portable device which is a regular communication partner. Provided is a communication device mounted on a mobile object including an acquisition unit configured to acquire a ranging trigger signal for starting measurement of a distance between the communication device and a portable device carried by a person and a communication control unit configured not to start ranging communication for measurement of the distance based on a fact that first specific information defined in advance and necessary for determination of the mobile object does not match second specific information included in the acquired ranging trigger signal and necessary for determination of the mobile object.