128.0.0.0=1 192.0.0.0=2 224.0.0.0=3 240.0.0.0=4 248.0.0.0=5 252.0.0.0=6 254.0.0.0=7 255.0.0.0=8 255.128.0.0=9 255.192.0.0=10 255.224.0.0=11 255.240.0.0=12 255.248.0.0=13 255.252.0.0=14 255.254.0.0=15 255.255.0.0=16 255.255.128.0=17 255.255.192.0=18 255.255.224.0=19 255.255.240.0=20 255.255.248.0=21 255.255.252.0=22 255.255.254.0=23 255.255.255.0=24 255.255.255.128=25 255.255.255.192=26 255.255.255.224=27 255.255.255.240=28 255.255.255.248=29 255.255.255.252=30 255.255.255.254=31 255.255.255.255=32