A non-transitory computer-readable medium stores computer-readable instructions that, when executed by a processor, cause a communication terminal to receive identification information from one or more communication devices via a communication interface, each identification information being periodically updated by a corresponding communication device, store first identification information into a memory, the first identification information being received from a specified communication device, perform communication with the specified communication device via the communication interface by using the stored first identification information, after disconnection of the communication, determine whether to use the first identification information or second identification information to reestablish the communication, the second identification information being transmitted by the specified communication device after the disconnection of the communication, when determining to use the first identification information, reestablish the communication using the first identification information, and when determining to use the second identification information, reestablish the communication using the second identification information.