Can you find the ip of a server someone in currently on in minecraft?

My brother is on this cool server he is making with his friends. He doesn't want me on the server right now but I want in. Is there anyway i can get the ip-address of the server he is currently logged onto?

It would be the ip address of his pc. You can find it if you can get on his pc, or check the router, the easier method is to use his computer. Go on it, press the windows key and r, it should open "Run". Here you need to type "cmd" and press enter. The command prompt will open up. Type in "ipconfig" and press enter. Look for where it says: ipv4 address…192.168.#.#
This is the ip address