A total of 12 sites are hosted on 136.243.10.254.
Here are the first 5 as they would appear when searched for:
bizcom.support-desk.ru/user/history
(null)
isif-life.support-desk.ru/user/history
(null)
support-desk.ru
Первый в Рунете сервис билетных досок Support-Desk
bizcom.support-desk.ru/user/login
(null)
pasprofit.support-desk.ru/user/ticket
(null)
...and the list of the remaining 7:
glopart.support-desk.ru/user/ticket
bizcom.support-desk.ru/user/profile
bizcom.support-desk.ru/user/ticket
glopart.support-desk.ru/user/history
rusinfobiz.support-desk.ru/user/ticket
glopart.support-desk.ru/user/login
isif-life.support-desk.ru/user/ticket