Class A IP address is used for a network with a large number of hosts.
Class B IP address is used for a network with a medium number of hosts.
Class C IP address is used for a network with less number of hosts.
|IP Address Class||Possible range of IP address|
|Class A||0.0.0.0 through 127.255.255.255|
|Class B||184.108.40.206 through 220.127.116.11|
|Class C||192.0.0.0 through 18.104.22.168|
|Class D||22.214.171.124 through 126.96.36.199|
|Class E||240.0.0.0 through 247.255.255.255|
The Class D IP addresses used for multicasting.
The Class E IP addresses are reserved for experimental purpose.
The maximum number of networks and hosts that can be represented using the various IP address classes is shown below in the table:
|IP Address Class||Maximum number of N/W||Maximum no of hosts per N/W|
|Class A||126 (2^7 – 2)||16777214 (2^24 – 2)|
|Class B||16384 (2^14)||65534 (2^16 – 2)|
|Class C||2097152 (2^21)||254 (2^8 – 2)|
Some IP Address are not available for general internet use, They are used for special purpose:
|127.xxx.xxx.xxx||Local loopback address. The value of the last 3 bytes are ignored. The datagram with this IP address is never transmitted over the network.|
|Local host IP address. The x represents the network ID bits|
|The IP address of a host in the local network. The x represents the host ID bits.|
|255.255.255.255||Limited Broadcast address. A datagram with this address will be received and processed by all the hosts in the local network. This datagram is not forwarded to other networks by routers.|
|Directed broadcast address. The datagram with this IP address is received by all the hosts in the specified network. The x represents the network ID bits|