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Where does HostName come from (that shows up on IP scan, like Angry IP?

When I use an IP scanner on my office LAN, the HostName that shows up (in the scanner's results) are sometimes not consistent with the setting for Computer Name on that PC (after a recent computer name change and reboot). Sometimes, I can reboot the nrewly-named PC several times, and Angry IP Scanner will still show the old name. How does this work? (Where does HostName come from on Angry IP?)

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Shmoid

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lee88

ASKER

Thanks for the answer Shmoid. Is there a local command line comand that will expedite the flushing-out of the old and registering of the new name with the DNS server?

Shmoid

On Windows 2000 and newer you can use the ipconfig command with the /registerdns switch to register the PC after a name change but it will not remove the old entry. Syntax is:
ipconfig /registerdns [adapter]

You can turn on DNS scavenging on the DNS server but it runs at a configurable interval. So it wouldn't help immediately after a name change. However, it does automate the task so you don't have to manually go and delete old records. Take a look at this article about DNS scavenging.

http://searchwindowsserver.techtarget.com/tip/0,289483,sid68_gci1040355,00.html

lee88

ASKER

Thanks for the very complete answer.

Shmoid

Glad I could help. Thanks for the points!