By # do you mean IP address?
Well, when I play most of the time I look for servers using GameTiger. (
http://www.gametiger.net/search?game=all&mod=ESF&submitButton=Mod+Search&count=100)
That link should take you to a list of game servers currently online playing the game.
To make the connection to the server, you can go into the console and type
connect IP the IP being the numerical IP address of the server.
But to make this much easier, there is a little tool you can download from GameTiger and you just click on the IP on the web page and it will connect you. Download that here.
http://www.gametiger.com/download.html
If you need any more help with that, just ask.
People here do care, and are willing to help. Don't assume we aren't.