Are you asking if you can use your world on another server?
If so, the answer is no.
If you\'re asking if you can use it for a new multiplayer server (yours, obviously) the answer is yes. When you start up your own server, it\'ll use the same one it uses in singleplayer. If you\'re using a hosting service, I believe you have to send them your server-database folder to them, and that should do the trick.