This is the revision history for rfc1918 in <freenode.net:#perlbot>

factoid_idsubjectcopulapredicateauthornamespace
4667 rfc1918 is rfc1918 is also bcp 5. It defines private networks that aren't to be routed on the public internet. The networks are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. perlbot <*:##NULL>