We were asked recently: is my house in the area covered by Hampton-in-Arden Parish Council?
This map from mapit.mysociety.org shows the Hampton-in-Arden Parish Council boundary. You can zoom in for more detail on the "live" map here or you can search by postcode on the mapit.mysociety.org homepage.
Solihull MBC also offers some information by postcode on their online maps page.