IP Address Classes

Address Class	Network ID	Default SN Mask	# Networks	# Hosts
Class A	1-126.0.0.0 (0)	255.0.0.0	126	16,777,214
Class B	128-191.0.0.0 (10)	255.255.0.0	16,384	65,534
Class C	192-223.0.0.0 (110)	255.255.255.0	2,097,152	254

Class A Loopback Address: 127.0.0.0

Private IP Addresses

Class A 10.0.0.1 – 10.255.255.254

Class B 172.16.0.1 – 172.31.255.254

Class C 192.168.0.1 – 192.168.255.254