while I'm not entirely sure if the servers were indeed moved, there is a possibility that they were.
1 day before the maintenance, DK Online was also having a maintenance. And that maintenance was confirmed for moving the servers to a different location. Now as for us, I'm not sure if they are doing the same thing, but given the circumstances from DKO, there is still a likely hood.
I'll try to find out what really happened from a GM later and I'll let you know if I find out anything.