1. Class B
   1. 128.0.x.x - 191.255.x.x
   2. 16,000 Networks
   3. 65,000 Clients
   4. Typically used in larger business networks
2. Class A
   1. 1.x.x.x - 126.x.x.x
   2. 127 Networks
   3. 16 Million Clients
   4. Typically used at ISP network level
3. Class C
   1. 192.0.0.x - 223.255.255.x
   2. 254 Clients
   3. 2 Million Networks
   4. Typically used in the SoHo