IP Addresses

[linzylu1190]

127.126.125.124 – Class A, Loopback
0.0.0.0 – Class A, This computer
172.17.168.127 – Class B, non-routable
192.168.1.48 – Class C, non-routable
12.13.14.15 – Class A, Directed broadcast
180.170.160.0 – Class B, Network
220.221.222.223 – Class C

Above I listed some IP addresses and have determined their class and what type of designated address they are.  I understand that some of them may have another special feature that I did not list...can anybody help me point them out?  Thank you.

[Geek-9pm]

Is this homework?
This a a general explanation of the IP address.
http://en.wikipedia.org/wiki/IP_address
It is customary to divide the address into four parts.. These are decimal numbers representing octal values. They are called octets. The idea is to make it easy for us mortals to visualize the address.
For IP6 it is popular t to use hexadecimal notation with some special short hand notations. In any case, most of use never need to worry about it.