http://www.ip-address.org/ip-address-classes.php "Class C IP addresses are used for smaller networks or local area networks. A class three IP address uses the first three octets to identify the network. The numbers range between 192 and 223."
Class A Intended for a small number of networks that had a large number of computers (hosts) attached. Class A IP Address have a value in the range 1...126 as the first octet. The values 0 and 127 are not available because they have special uses. Class A addresses use the first octet to identify the network which means that 126 addresses are usable, each of which can support 16,777,216 computers (hosts). Class C Intended for a large number of networks that would have a small (relatively) number of computers (hosts) attached. Class C IP Addresses have a value in the range 192...223 as the first octet. Class C addresses use the first three octets to identify the network which means that 2,080,800 addresses (networks) are possible, each of which can support 254 computers (hosts).
C class addressing range is 192 to 223. In C class addressing First 3 octets is reserved for network and 1 octets is preserve for Host.
There are mainly four types of classes of ip Class A 1-126 Class B-128-192 Class C 192-223 Class d 223-239 Class E 240-255