IP Address Classes

The table below shows the IP address classes. This could be handy for someone trying to remember possible IP ranges of a particular IP class. The first 8 bits of the IP address are used to determine the class.

Class Address Range No. of Network Hosts
A 1-126.x.y.z 126 16,777,214
B 128-191.x.y.z 16,384 65,534
C 192-223.x.y.z 2,097,152 254