A non-transitory computer-readable recording medium stores a set of program instructions for a communication terminal. The instructions cause, when executed by a processor of the communication terminal, the communication terminal to operate to obtain updated ID information and fixed ID information of a communication apparatus, and communicate with a communication apparatus based on the updated ID information. The updated ID information is periodically updated on the communication apparatus side, while the fixed ID information is not periodically updated. When the communication terminal is incapable of communicating with the communication apparatus based on the updated ID information, the updated ID information and the fixed ID information are obtained again from the communication apparatus. When the fixed ID information stored in storage coincides with the newly obtained fixed ID information, a communicating process of communicating with the communication apparatus is performed based on the newly obtained updated ID information.