====== IP Address classes ======
^Class^Leading bits^Size of network number bit field^Size of rest bit field^Number of networks^Addresses per network^Start address^End address^
|Class A|0|8|24|128 (27)|16777216 (224)|0.0.0.0|127.255.255.255|
|Class B|10|16|16|16384 (214)|65536 (216)|128.0.0.0|191.255.255.255|
|Class C|110|24|8|2097152 (221)|256 (28)|192.0.0.0|223.255.255.255|
|Class D (multicast)|1110|not defined|not defined|not defined|not defined|224.0.0.0|239.255.255.255|
|Class E (reserved)|1111|not defined|not defined|not defined|not defined|240.0.0.0|255.255.255.255|