How To : Check Application Pools that a site is using from IIS 7

Check Application Pools

Things that you need to do :

1. Open IIS, in this case IIS 7

2. Go to sites -> Default Web Site -> 'YourSiteName'

3. Go to action panel, choose Advanced Settings...

4. There you will see the name of your application pools 

You are ready to go ^^

Reference : Sendy Santoso (http://geekydeveloper.blogspot.com/)