We have had to move worlds 19,20,21 and 25 to a different location, because the company that was providing bandwidth for them previously has suddenly ceased trading. This meant we had to arrange an alternative at very short notice.
So we could get them up and running again as quickly as possible, those worlds have now been moved to one of our other existing providers.
Their new home is 'nlayer'. We already had a few worlds there and were very happy with their reliability/performance, so in fact the relocated worlds should hopefully run faster than ever at their new location.
All the worlds should now be functioning normally again.