A server associated with a core network may include a memory storing computer-readable instructions; and at least one processor coupled to the memory, the at least one processor configured to execute the computer-readable instructions to, generate a list of preferred instances of a first network function, transmit the list of the preferred instances to a server associated with a third network function, and receive a request to establish a communication session with a selected instance selected from the list of the preferred instances, if the server is associated with a selected instance of a second network function associated with the selected instance of the first network function.