IPv4
Martians include bogons and packets with source or destination addresses within special-use ranges:
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Address Block Present Use 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-1 192.168.0.0/16 Private-Use Networks 198.18.0.0/15 Network Interconnect Device 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 Reserved for Future Use 255.255.255.255/32 Limited Broadcast
Read more about this topic: Martian Packet