I need to find the 5 nearest zip code of a zip code. For example, I have 33304, and I need to find the nearest ones, like 33309, 33308 ...
Is there a database or a web service somewhere that would help me with that?
I think I'm gonna have to build my own database in order to do that? I know how to do it, but in case it has already been done ...
what country? Maybe you want to checkout Geonames: http://www.geonames.org/
Especially: http://www.geonames.org/export/web-services.html#findNearbyPostalCodes