255.255.255.255  /32    0.0.0.0
255.255.255.252  /30    0.0.0.3
255.255.255.248  /29    0.0.0.7
255.255.255.240  /28    0.0.0.15
255.255.255.224  /27    0.0.0.31
255.255.255.192  /26    0.0.0.63
255.255.255.128  /25    0.0.0.127
255.255.255.0    /24    0.0.0.255
255.255.254.0    /23    0.0.1.255
255.255.252.0    /22    0.0.3.255
255.255.248.0    /21    0.0.7.255
255.255.240.0    /20    0.0.15.255
255.255.224.0    /19    0.0.31.255
255.255.192.0    /18    0.0.63.255
255.255.128.0    /17    0.0.127.255
255.255.0.0      /16    0.0.255.255
255.254.0.0      /15    0.1.255.255
255.252.0.0      /14    0.3.255.255