when i run ping plotter on different systems i get different DNS names for the same IP addresses.

i put the same thing (e.g. "www.mydomain.com") in each instance of ping plotter, and the displayed IP addresses for each final hop are the same. but the DNS name field for one is "mail.mydomain.com" and the other is "www.mydomain.com".

where does the info in this column come from? is it a reverse DNS lookup from the IP address returned from the ping? does it have anything to do with the client pc's DNS server settings?

i would be grateful for any thoughts on this-- it may be pertinent to the problem i'm using ping plotter to help diagnose....