Forum Post: whether a table is existed in the coordinator that the connection was established between the coordinator and the end divices?

hi

   The devices send the data request frame to the coordinator periodicity that the coordinator can know whether  the end devices in the network, So, i think there is a table is exist  in the coordinator that records the end device information which is connected to the coordinator.I want to know how many end devices were connected to the coordinator that I can manage the network between the coordinator and the end devices,so how can I do?

thank you!