I have a bookmark at work for IP addresses i.e. what IP addresses tally with what company, organisation, geographical location, etc..
Want me to dig it up? It may not be useful I don't know.. I use it at work so I can track people using my B2B (business-2-business) website..
For example, if someone is using my site and I want to know what their employer is, I can find out. Ford for example..
Perhaps this is not of any use....
Info Technology is a funny business. You think you know loads.. yet there is still much left not understood...