Math confuses me.
You may be right about the actually numbers, not sure. Here is a page one it.
http://support.wrq.com/tutorials/tcpip/ipadd1.html
All I know is Class C is reserved for private addresses.
That is IPv6 and is suppose to replace the IP addressing that we use now since we are running out of addresses.
One little problem, all the routers in the world will need to be upgraded. Also all the OS will need to be upgraded as well. Mac OS X supports it, not sure what other OS do.