DNS mapping

[oivind.lund () gmail com]

I was wondering if there is an easy way to write a script to use for reverse DNS mapping.
For instance, inputting the address test.com to the script and then having the script reverse mapping the address and 
testing other common DNS names like mail.test.com , web.test.com etc ?
Or maybe there is a tool available which allows me to do this and make my own list of common DNS names ?

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