1) Go to http://www.nationaltrustnames.org.uk/Surnames.aspx
2) Type in your surname.
3) Click "Geographical Location" at the top
It will come up with some statistics about your surname - post the most common job asociated with your name, how many people are more "rural" than you, and how many people have a posher name.
For me, it's:
Mosaic type with highest index # In Military Quarters
% of people with a more rural name 79
% of people with a more high-status name 90
I'm very, very working class, apparently.