Darrin Wilson

I have a single player explore world that I would like to open to multiplayer for my stepson to play on as well. I've gone through the steps to open and publish it to online play but I don't understand how he can determine which of the many available servers it is. There seem to be a ton of generically named servers with nothing to indicate which one is mine. Is there a way I can rename it or have him search for mine specifically?