The following table displays the three main IP address classes, along with their decimal address ranges, number of networks per class, and the number of available hosts in each class.
Class
Address Range
Number of Networks
Number of Hosts
A
1.0.0.0 to 126.0.0.0
128
16,777,214
B
128.0.0.0 to 191.255.0.0
16,386
65,532
C
192.0.0.0 to 223.255.255.0
~2 million
254
D
224.0.0.0 to 239.255.255.254
Reserved for multicast
-
E
240.0.0.0 to 254.255.255.255
Reserved for research