123.45.67.89 123.45.67.98 -> ###.###.###.89 ###.###.###.98
0.0.0.0 -> ###.###.###.0
10.1.2.3 -> ###.###.###.3
172.001.002.003 -> ###.###.###.003
192.168.128.1 -> ###.###.###.1
255.255.255.255 -> ###.###.###.255