A total of 9 sites are hosted on 74.86.8.12.
Here are the first 5 as they would appear when searched for:
hentai-foundry.com/user/TheRealShadman
(null)
hentai-foundry.com/user/Toyas
(null)
hentai-foundry.com/user/Doomington
(null)
hentai-foundry.com/user/Eggplants
(null)
hentai-foundry.com/user/DrGraevling
(null)
...and the list of the remaining 4:
hentai-foundry.com/user/Vanja
hentai-foundry.com/user/Swegabe
hentai-foundry.com/user/Gmeen