are you attacking it from the internet or from within your network?
some genneral fact finding methods:
doing a tracert will tell you approxamitly where, if you learn to understand the location codes used in the naming conventions.
Doing a dig will give you lots of info on an ip addy
using ping -a will give you the name of the machine.
A scanner like nmap can be used to find out what the OS is
or you can pipe "echo quit" threw netcat to see how the services respond
if its internel the NET commands will give you plenty of info or you could use winterragator
