IP Address Ranges

IPv4
The authoritative overview of IPv4 assignments can be found at IANA ipv4-special-registryor RFC 6890.

IPv6
The authorative overview of IPv4 assignments can be found at RFC 5156 and IANA ipv6-special-registry for special purposes. RFC 4291 and IANA ipv6-address-space list address layout and regular allocations.

Note that with IPv6, you can specify the interface, as specified in RFC 4007.

List of Valid IP addresses
A project to annihilate (bogus) private IP traffic (RFC1918) traffic on the routed Internet, by creating a black hole AS that advertises those IP ranges. Bogon IP addresses are IP addresses that should not be seen one the public internet, like 127.2.6.28. This list includes some of the above ranges, and also IP ranges which are currently unassigned by the RIRs (ARIN/RIPE/APNIC/AfriNIC/LACNIC). Unlike the above list, the list of assigned and unassigned addresses changes regularly, and must be updated frequently.
 * The AS112 project:
 * Bogon IP Addresses: