A Internet address might be 9.255.253.254. In dotted decimal notation, the first two bytes represent the network number, and the remaining two bytes are available for the host number. Class B addresses are assigned the numbers 128.1 through 191.255 as the first two bytes. This division allows 16,384 class B network numbers and over 64,000 hosts for each class B network number. An example of a class B Internet address might be 128.127.42.101.
Many large organizations use class B addresses.
In dotted decimal notation, the first three bytes represent the network number, and the remaining byte is available for the host number. Class C addresses are assigned the numbers 192.0.1 through 225.255.255 as the first three bytes. This division allows just over 2 million class C network numbers and 254 hosts for each class C network number. An example of a class C Internet address might be 192.32.5.35. Smaller organizations often use one or more class C addresses.