Wikipedia
Doxbin
Doxbin was a document sharing and publishing website which invites users to contribute personally identifiable information, or " dox", of any person of interest. It operated on the darknet as a Tor hidden service. Due to the illegal nature of much of the information it published, it was one of many sites seized during Operation Onymous, a multinational police initiative, in November 2014. It was restored under different ownership in the same month.
A similar such hidden service site for doxing is Cloudnine.