duckduckgo/zeroclickinfo-goodies — pull request #170 by koosha-- (2013-03-22 10:43:39+00:00)
Title: Add ReverseDNS goodie for reverse IP lookups

Goodie request:

https://duckduckhack.uservoice.com/forums/5168-ideas-for-duckduckgo-instant-answer-plugins/suggestions/2678793-reverse-dns-an-ip-address

Not sure if it is the best solution but it does work.