Thank you very much for the link! Didn't know about that one. I have always used: http://www.zip-codes.com/ http://www.zip-codes.com/ They do charge a nominal

Thank you very much for the link! Didn't know about that one. I have always used: http://www.zip-codes.com/ http://www.zip-codes.com/ They do charge a nominal fee, but the data quality is excellent and they have monthly updates.