Locating a store by zip code only

Is it possible to for a user to enter a zip code into the address bar and the plugin locate stores based on the zip entered? Some users do not the full address, probably because they don’t know the address of their destination, and therefore want to enter a zip code, but i’m seeing that this shows 0 results. Is this a feature that the plugin will accomodate?

http://wordpress.org/extend/plugins/store-locator-le/