Private IPv4 addresses have the following class configurations:
- Class A IP addresses. Configurations range from 10.0.0.0 to 10.255.255.255. This class is for large networks and has 8 bits for the network and 24 bits for hosts.
- Class B IP addresses. Configurations range from 172.16.0.0 to 172.31.255.255. This class is for medium networks and has 16 bits for the network and 16 bits for hosts.
- Class C IP addresses. Configurations range from 192.168.0.0 to 192.168.255.255. This class is for smaller networks and has 24 bits for the network and 8 bits for hosts.
Private IPv6 private address ranges include the following:
- fc00::/7 address block. These are reserved IP addresses from the Internet Assigned Numbers Authority for unique local addresses.
- fec0::/10 address block. These are for deprecating site local addresses.