How do I "scan" my LAN and find the host name of the server computer?

I need to scan my LAN to find out the IP and host name of the computer in which is waiting for client acceptance because the server side of my program is not always on the same computer. Therefore, the IP and host name of my server is not final and can be placed on any computer on my network with over 50 connected computers. How might I check to see which computer is waiting for a client?
EDIT: I need the host name only, disregard IP
Thanks!

watwatacrazy wrote:
jwenting wrote:
Peter__Lawrey wrote:
If you know the port you can try to connect to each of the machines in turn.the people getting firewall warnings about intrusion attempts would just love that, as would the network admins whose network you're clogging with traffic (imagine several hundred clients doing that all day long, let alone tens of thousands).
If they are all one the same subnet you can use the IP addresses.Which you don't necessarilly all know. Or do you propose just sweeping through all possible IP addresses in the subnet's range? That would be a sure trigger for your network admins to immediately kick you out.
This should take a few seconds at most.Until the automatic safeguards kick in and you're thrown off the net :)In that case, what would you suggest?Not to bother. The server address should be part of the application configuration, not guessed at runtime.

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How do I "scan" my LAN and find the host name of the server computer?

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