Subnetting and VLSM

Classes:

Class A | 1.0.0.1 - 127.255.255.255 | Mask: 255.0.0.0 | 126 Networks & 16,777,214 Hosts

Class B | 128.0.0.1 - 191.255.255.255 | Mask: 255.255.0.0 | 16,384 Networks & 65,534 Hosts

Class C | 192.0.0.1 - 223.255.255.255 | Mask: 255.255.255.0 | 2,097,152 Networks & 254 Hosts

Private Addresses:

Class A |  10.0.0.0 - 10.255.255.255

Class B | 172.16.0.0 - 172.31.255.255

Class C |  192.168.0.0 - 192.168.255.255

Subnetting Example