Host

• 127.0.0.0/8

Link Local

• 169.254.0.0/16

RFC1918

• 10.0.0.0/8
• 172.16.0.0/12
• 192.168.0.0/16

Documentation (RFC 5737)

• 192.0.2.0/24 Assigned as TEST-NET-1, documentation and examples.
• 198.51.100.0/24 Assigned as TEST-NET-2, documentation and examples.
• 203.0.113.0/24 Assigned as TEST-NET-3, documentation and examples.
• 233.252.0.0/24 Assigned as MCAST-TEST-NET, documentation and examples.
• 198.18.0.0/15 Used for benchmark testing of inter-network communications between two separate subnets.

Other

• 224.0.0.0/4 Multicast
• 192.88.99.0/24 IPv6 to IPv4 Translation
• 192.0.0.0/24 IETF Protocol Assignments