IP address used for LAN. ip address range is used by millions of users to interact computers and Internet devices inside the local networks which can not connect from internet. LAN to access the Internet using routers and gateways.

All computers inside the a local network have unique ip which are in the range:

IANA-reserved private IPv4 network ranges

	Start	End	No. of addresses
24-bit block (/8 prefix, 1 × A)	10.0.0.0	10.255.255.255	16777216
20-bit block (/12 prefix, 16 × B)	172.16.0.0	172.31.255.255	1048576
16-bit block (/16 prefix, 256 × C)	192.168.0.0	192.168.255.255	65536

IPv6:starting with FC or FD. for exemple fc00::/7 or fd00::/8
The address block fc00::/7 has been reserved by IANA as described in RFC 4193

RFC 4193 Block	Prefix/L	Global ID (random)	Subnet ID	Number of interface addresses in subnet
fd00::/8	fd	xx:xxxx:xxxx	yyyy	18,446,744,073,709,551,616
	48 bits		16 bits	64 bits