Yes Mutt, I have been using Neotrace for quite some time. The program will take you right back to the offending party. Including the address and telephone numbers in some instances.
There is another great reason to have Neotrace. If your internet connection appears to quit, you can log on to Neotrace and find out where the dead connection is. In some cases the ISP will give us a snow job on what the problem is and won't own up to the fact that their lines are down. This keeps them honest because it will tell you where the problem is on the line. Heartily recommended.
Regards