RFC5735 Outlines the different reserved ipv4 addresses. In addition to the RFC1918 space (10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16) There are Other Ranges. Here is a quick Summery of the reserved ranges.
0.0.0.0/8 "This" Network 10.0.0.0/8 Private-Use Networks 127.0.0.0/8 Loopback 169.254.0.0/16 Link Local 172.16.0.0/12 Private-Use Networks 192.0.0.0/24 IETF Protocol Assignments 192.0.2.0/24 TEST-NET-1 192.88.99.0/24 6to4 Relay Anycast 192.168.0.0/16 Private-Use Networks 198.18.0.0/15 Network Interconnect Benchmark Testing 198.51.100.0/24 TEST-NET-2 203.0.113.0/24 TEST-NET-3 224.0.0.0/4 Multicast 240.0.0.0/4 Class E Reserved 255.255.255.255/32 Limited Broadcast
In my Future entries I will try to use the three TEST-NET ranges for documentation examples.