Private Network Address Ranges
Class A: 10.0.0.0 with net mask 255.0.0.0 Class B: 172.16.0.0 through 172.31.0.0 with net mask 255.255.0.0 Class C: 192.168.0.0 through 192.168.255.0 with net mask 255.255.255.0
Sometimes, after you get what you want, you realize, that it wasn't what you needed.
Class A: 10.0.0.0 with net mask 255.0.0.0 Class B: 172.16.0.0 through 172.31.0.0 with net mask 255.255.0.0 Class C: 192.168.0.0 through 192.168.255.0 with net mask 255.255.255.0