Hi there,
I am bit confused as to what you are looking for. Are you looking for dns name associated with a particular IP?
When you say that you VNC your server using vncviewer xxx.xxx.xxx.xxx
ort_number you can replace xxx.xxx.xxx.xxx with the server name if you have DNS configured.
Also if you have DNS configured you can perform the reverse lookup to find the server name: ping -a xxx.xxx.xxx.xxx
Also you can do nslookup xxx.xxx.xxx.xxx to find the server name.
PS: (: p is appearing as smiley ;-))