MonoBehaviour.OnMasterServerEvent(MasterServerEvent)

Description

Called on clients or servers when reporting events from the MasterServer.

Like, for example, when a host list has been received or host registration succeeded.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Start() {
        Network.InitializeServer(32, 25000);
    }
    void OnServerInitialized() {
        MasterServer.RegisterHost("MyGameVer1.0.0_42", "My Game Instance", "This is a comment and place to store data");
    }
    void OnMasterServerEvent(MasterServerEvent msEvent) {
        if (msEvent == MasterServerEvent.RegistrationSucceeded)
            Debug.Log("Server registered");
        
    }
}