hostname analyzing problem in windows 2008.
172.100.100.3 00-22-64-2D-44-4E 0 ms cpe-172-100-100-3.twcny.res.rr.com
I use nirsoft netbscanner, it work well.
Yikes, that is a problem using public IP addresses on your private network is not a good thing. It can cause some very strange issues. You really should consider changing your network to a private IP address space.