This table is the list of the RFC 1918 non-routable addresses on the Internet

Class Start End Mask CIDR CIDR Mask CIDR Wildcard
A 10.0.0.0 10.255.255.255 255.0.0.0 10.0.0.0/8 255.0.0.0 0.255.255.255
B 172.16.0.0 172.31.255.255 255.240.0.0 172.16.0.0/12 255.240.0.0 0.15.255.255
C 192.168.0.0 192.168.255.0 255.255.255.0 192.168.0.0/16 255.255.0.0 0.0.255.255
Some other special address ranges
Windows autoconfiguration (for when the DHCP server is down)
B 169.254.0.0 169.254.255.255 255.255.0.0 169.254.0.0/16 255.255.0.0 0.0.255.255