This is a start:
http://www.arin.net/tools/index.html
Depending where you are in the world.
I think ZoneAlarm Pro offers tracking too; but I am not sure........
I live in North America and am married to a Korean woman....we were having a bunch of hack attacks/emails coming to us....
Turns out it was from a high school in Korea that my wifes mom used to teach at.......
A 20 second telephone call from my mother in law stopped it all.....