Why the server 31.215.205.103:28010 is down?

Why the server 31.215.205.103:28010 is down?
it worked yesterday and now it dosent works (http://playrust.com/play/31.215.205.103:28010/)
is it close? the ip has been changed?

im not sure what server it was, but there was sleepers and pvp.

[editline]30th October 2013[/editline]

?