FFXI will merge several servers from March 7th to March 16th. To avoid any inconvenience resulted by server merging, we will try our best to finish all orders of the merged server timely and keep speed for delivery. Any enquiry, please feel free to contact with our live help. 

The following is a list of Worlds designated for the World Merge.

Source World -> Destination World

Ramuh ->Bahamut
Alexander ->Shiva
Titan ->Phoenix
Gilgamesh ->Curbuncle
Unicorn ->Fenrir
Ifrit ->Odin
Diabolos ->Siren
Caitsith ->Ragnarok

* Other Worlds will not be affected. 
 

Reference: http://ffxi.allakhazam.com/story.html?story=25473