Some client software caches that so use NSLOOKUP to determine if it's Windows or something else. Also check your HOSTS file.
I am using toad for oracle development. Whenever i perform any operation in toad, it goes to an ip address to resolve the database server name. That IP address was previously used as our dns server but no more exists in our network. I flushed by dns using ipconfig /flushdns commad but unable to get ride of this IP address. Also I have reinstalled my oracle client and toad but that IP address is alwayes there.
Can any body suggest me some way to find out where this entry exist in windows DNS setting.