I can't find it for some reason, feeling a little dumb. How do I know? I'm using .net 4 with VS2010.
Open web.config file and find the System.Web.Mvc assembly definition:
assembly="System.Web.Mvc, Version=3.0.0.0 ..."
It's an MVC3 as you see. Via web you can use MvcDiagnostics which is similar to phpinfo() functionality in PHP.
phpinfo()
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