0.0.0.0/8
1.0.0.0/8
2.0.0.0/8
5.0.0.0/8
10.0.0.0/8
127.0.0.0/8
255.0.0.0/8
192.168.0.0/16
169.254.0.0/16
172.16.0.0/20
224.0.0.0/24		# rfc 3330 says this is /4.  not sure
fc00::/7
