Somebody tell me which framework, or CMS or platform is the English premier league website developed on?

I'm a Kenyan developer and would like to make a website for the Kenya premier league that emulates the English premier league. My guess is that it has some C# in it though a good understanding of the framework or CMS platform in which it runs on is critical. Maybe if I get to know the company that developed that site, it would be a good lead to my understanding of the platform that it uses. Thanks.