You can do it the hard way. In Win7/8 use the resource monitor to see what IPs h1z1 is talking to and ping them..
Hit CTRL+SHIFT+ESC to bring up Task Manager, Click Performace tab, Click Resource Monitor button..
Find the h1Z1.exe in the Network Activity list and ping the address shown. The address that ends in *.vivox.com is the voice server, the connected server is the *.h1z1.net address..