In a case where a first wireless communication with an external device is executed via a first wireless interface, a communication device may determine whether a specific signal including parent station information is received from the external device via a second wireless interface. The parent station information may indicate that an operation state of the external device is a state in which the external device operates as a parent station of a wireless network. The communication device may supply a communication instruction to the second wireless interface in a case where it is determined that the specific signal including the parent station information is received. The communication instruction may be for executing a second wireless communication with the external device via the second wireless interface. The second wireless communication may include a communication for participating as a child station in the wireless network.