A total of 23 sites are hosted on 104.28.15.27.
Here are the first 5 as they would appear when searched for:
milfmycock.com
Not too young, not too old ...
movingpackets.net
Internetworking Views and Reviews
avatraffic.com/user/popunder_streams
(null)
...and the list of the remaining 18:
avatraffic.com/user/orders
avatraffic.com/user/withdraw
avatraffic.com/user/tickets
avatraffic.com/user/transactions
avatraffic.com/user/referrer_stats
avatraffic.com/user/referral_stats
avatraffic.com/user/ticket_read
avatraffic.com/user/buy