Shown below is the Public IP Address Range & Private IP Address Range.
Public IP Address Range:Class A(Netid.hostid.hostid.hostid) : 1.0.0.0 to 126.0.0.0
Class B(Netid.Netid.hostid.hostid) : 128.0.0.0 to 191.0.0.0
Class C(Netid.Netid.Netid.hostid) : 192.0.0.0 to 223.0.0.0
Class D(Multicast) : 224.0.0.0 to 239.0.0.0
Class E(For Research) : 240.0.0.0 to 255.0.0.0
Private IP Address Range:Class A(/8) : 10.0.0.0 to 10.255.255.255
Class B(/12) : 172.16.0.0 to 172.31.255.255
Class C(/16) : 192.168.0.0 to 192.168.255.255
Note:/8 = First 8 Bits are used for Network ID
/12 = First 12 Bits are used for Network ID
/16 = First 16 Bits are used for Network ID