Hi All,
thanks for all your help

I shall again try to explain it to you.

There are several sites hosted by our organisation.
eg, www.xxxxx.com , www.xxxxxx.net , www.xxxx-tools.com and so on.
There are several servers on which these are hosted.
As I am new to this environment I dont know which site is hosted on which server.
When I tried nslookup www.xxxxx.com, I got routable IP 78.xxx.xxx.xxx (external IP). Now how can I determine, on which server the site is hosted.
I know a bit of a concept which says, a site can be hosted on several servers too. If it is hosted on several diferent servers, I want their nonroutable (Internal IPs).

Is there any way I can find it.
Please

I'm not entirely sure what you're asking. If you mean that you know a public IP address that points to a router, and you want to know what local IP on the subnet behind that router you're connecting to, you're out of luck. That's the magic of network address translation.

Still, perhaps you could give us more detail about the situation you're in? For future reference, that post doesn't contain much to go on, and you'll save time and get more assistance if you can give the people you're asking for help as much (relevant) info as possible upfront.

Well Mr Rohit,
you have to explain the situation more clearly and with the exact scenario. I mean give us some example that related to your situation.

Unless you looking at the site from the "inside" you won't be able to.

"Internal IP" is another term for a non-routable IP address. Non-routable means that a router will never forward packets to a computer or other device that has a non-routable IP address.

"External IP" is another term for a routable IP address. When people talk about internal and external IPs, they are usually talking about a NAT router. NAT stands for Network Address Translation, and the form of it that most people are familiar with is the form that allows multiple computers to share a single Internet connection via one physical connection to the ISP. If you have a NAT router in your home, each computer connected to it has an internal IP, while the router itself is assigned an external IP. If you didn't have a router, the external IP would be assigned to whatever computer is connected to your ISP.

Hope this helps you understand. Or I'm answering the wrong Q'

could always view the apache configuration files to determine what sites are on which servers..