A.1~32 B.1~512 C.1~4094 D.0~4095
A.192.168.168.129-190 B.192.168.168.129-191 C.192.168.168.128-190 D.192.168.168.128-192
A.255.255.255.0 B.255.255.255.128 C.255.255.255.192 D.255.255.255.224