Un site utile : calculateur du CNRS de Grenoble

Masque réseau CIDR Wildcard
255.255.255.255 /32 0.0.0.0
255.255.255.254 /31 0.0.0.1
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
255.248.0.0 /13 0.7.255.255
255.240.0.0 /12 0.15.255.255
255.224.0.0 /11 0.31.255.255
255.192.0.0 /10 0.63.255.255
255.128.0.0 /9 0.127.255.255
255.0.0.0 /8 0.255.255.255
254.0.0.0 /7 1.255.255.255
252.0.0.0 /6 3.255.255.255
248.0.0.0 /5 7.255.255.255
240.0.0.0 /4 15.255.255.255
224.0.0.0 /3 31.255.255.255
192.0.0.0 /2 63.255.255.255
128.0.0.0 /1 127.255.255.255
0.0.0.0 /0 255.255.255.255