Right-click on the folder in your working copy, choose "Properties" from the explorer context menu. Then, in the properties dialog, switch to the "Subversion" tab. There you can see all sorts of information about the selected folder, including to what URL it points to.
Another quick way of seeing this information is to select "Relocate" from the context menu and look at the first URL. Since you don't want to relocate your WC, just abort this dialog.