Why do you have 5 Classes of IP Address?

We have a total of five classes of IP addresses (A,B,C,D,E). Class A, B, and C are used on local and wide area networks. Class D is used for multicasting purposes. Class E is experiential and is not in use today.

Class A range starts from 0.0.0.0 --- 127.255.255.255

Class B range starts from 128.0.0.0 --- 191.255.255.255

Class C range starts from 192.0.0.0 --- 223.255.255.255

Class D range starts from 224.0.0.0 --- 239.255.255.255

Class E range starts from 240.0.0.0 --- 255.255.255.255