A communication terminal that serves as a coordinator configured to perform wireless communication with a plurality of peripheral terminals including a device , the communication terminal comprising: a nonvolatile storage configured to store network identification information for identifying a network (NT1, NT2) and device information indicative of a device that has participated in the network; and a communication controller configured to control wireless communication performed with the plurality of peripheral terminals, the communication controller being configured to, at startup of the communication terminal, determine whether or not the device information is stored in the storage , in a case where the device information is not stored in the storage , transmit an identification information acquisition request (Y11), receive network identification information of a different coordinator that is sent back from the different coordinator that has received the identification information acquisition request (Y11), and write network identification information that is different from the received network identification information of the different coordinator into the storage , and establish wireless communication based on the network identification information written into the storage , and in a case where the device information is stored in the storage , establish wireless communication based on the network identification information stored in the storage . a nonvolatile storage configured to store network identification information for identifying a network (NT1, NT2) and device information indicative of a device that has participated in the network; and a communication controller configured to control wireless communication performed with the plurality of peripheral terminals, the communication controller being configured to, at startup of the communication terminal, determine whether or not the device information is stored in the storage , in a case where the device information is not stored in the storage , transmit an identification information acquisition request (Y11), receive network identification information of a different coordinator that is sent back from the different coordinator that has received the identification information acquisition request (Y11), and write network identification information that is different from the received network identification information of the different coordinator into the storage , and establish wireless communication based on the network identification information written into the storage , and transmit an identification information acquisition request (Y11), receive network identification information of a different coordinator that is sent back from the different coordinator that has received the identification information acquisition request (Y11), and write network identification information that is different from the received network identification information of the different coordinator into the storage , and establish wireless communication based on the network identification information written into the storage , and in a case where the device information is stored in the storage , establish wireless communication based on the network identification information stored in the storage . <EOS>