Finding the IP+PORT of a proxy site

Is there a way to get a proxy site like "http://www.extremeproxy.co.uk/" and find the IP and PORT number I could use to set it as a browser proxy(To be used and enabled permenently from the browser settings.)?

 

A simple ping from a command prompt or terminal will translate the URL to an IP 141.101.117.253

As for ports, I am unsure. As HTML requests go in on port 80, try that to begin with.