techniques to count servers

This is a sort of continutation from a thread i started in one of the WHT topics, but it wasn't resolved there so i thought i'd try this topic.

I'm curious about someone's server setup. I'm using yousendit.com as an example.
I've idendified s1.yousendit.com - s67.yousendit.com all who seem to have unique IPs (although i didn't check them all). So that's at least 67 servers which all seem to be IIS.

I've used netcraft.com and tracert for most of my info. Can anyone confirm this using some other method/technique/utility and would they be willing to share that method with me?

C

 

 

 

 

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