Netmask Address Prefix Length Hosts / Class C's / Class B's / Class A's
255.255.255.255 /
255.255.255.254 /
255.255.255.252 /
255.255.255.248 /
255.255.255.240 /
255.255.255.224 /
255.255.255.192 /
255.255.255.128 /
255.255.255.0 / (Class C) /
255.255.254.0 / /
255.255.252.0 / , /
255.255.248.0 / , /
255.255.240.0 / , /
255.255.224.0 / , /
255.255.192.0 / , /
255.255.128.0 / , /
255.255.0.0 / (Class B) , / /
255.254.0.0 / , / /
255.252.0.0 / , / /
255.248.0.0 / , / /
255.240.0.0 / ,, / / 16
255.224.0.0 / ,, / /
255.192.0.0 / ,, / , /
255.128.0.0 / ,, / , /
255.0.0.0 / (Class A) ,, / , / /
254.0.0.0 / ,, / , / /
252.0.0.0 / ,, / , / , /
248.0.0.0 / ,, / , / , /
240.0.0.0 / ,, / ,, / , /
224.0.0.0 / ,, / ,, / , /
192.0.0.0 / ,,, / ,, / , /
128.0.0.0 / ,,, / ,, / , /
0.0.0.0 / (The Internet) ,,, / ,, / , / 256
.
