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Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt
There is 1 alternative - vote for the best!
Performs a reverse DNS lookup, variants include:
nslookup 74.125.45.100
or:
host 74.125.45.100
If you can do better, submit your command here.
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Glad you're enjoying our blog. In future, however, it would be nice if you gave some attribution when you're posting our content here on commandlinefu. This one is from http://blog.commandlinekungfu.com/2009/03/episode-5-simple-text-manipulation.html
Hal Pomeranz