1. Checking From the Command Line (Vista or XP Pro)
If you want to see what services are being hosted by a particular svchost.exe instance, you can use the tasklist command from the command prompt in order to see the list of services.
tasklist /SVC
2. Using Process Explorer in Vista or XP
You can use the excellent Process Explorer utility from Microsoft/Sysinternals to see what services are running as a part of a svchost.exe process.
http://www.howtogeek.com/howto/windows-vista/what-is-svchostexe-and-why-is-it-running/