Range of IP Address

There are 2 versions of IP  i.e.  IPV4 and IPV6
IPV4:IPV4 is called decimal doted notation, it is a 32bit address .
IPV6:IPV6 is called hexadecimal doted notation, it is a 128bit address..

IPV4 divided into classes.Please find below
Class A Range : 0.0.00 to 127.255.255.255        Reserved for LAN & WAN
Class B Range :128.0.0.0 to 192.255.255.255    Reserved for LAN & WAN
Class C Range:192.0.0.0 to 223.255.255.255     Reserved for LAN & WAN
Class D Range:224.0.0.0 to 239.255.255.255     Reserved for Multicasting
Class E Range: 240.0.0.0.0 to 255.255.255.255 Reserved for R&D(Research & Development)

IPV4 divided in Private and Public ip address.
Private IP address
Class A Range: 10.0.0.0 to 10.255.255.255
Class B Range:172.16.0.0 to 172.31.255.255
Class C Range:192.168.0.0 to 192.168.255.255
Above ip address are not valid for internet.These ip address are only valid for private organizations.All other ip address are public ip.