A total of 15 sites are hosted on 185.31.19.193.
Here are the first 5 as they would appear when searched for:
imgur.com/user/GoodBoyDaisy
(null)
imgur.com/user/mjvbulldog
(null)
imgur.com/user/pumpkinfeed
(null)
imgur.com/user/IGotTopCommentOnImgurAndAllTheyGaveMeWasThisStupidUsername
(null)
imgur.com/user/NwabudikeMorgan
(null)
...and the list of the remaining 10:
imgur.com/user/ericross
imgur.com/user/wadjet
imgur.com/user/Samproof
imgur.com/user/kodandapaani
imgur.com/user/LordEnglish
imgur.com/user/idrinkcheapbeer
imgur.com/user/gregdodge
imgur.com/user/alex144591
imgur.com/user/fungur