ZIP Code Tools is an indispensible tool to perform common U.S. ZIP Code & Area Code searches and data completion. It interfaces with the databases from ZIP-Codes.com. With ZIP Code Tools, you can:
+ Lookup Area Code
+ Lookup Area Code/Prefix
+ Find ZIP Code by Map
+ Find ZIP+4 of Address
+ Lookup ZIP Code Details (complete with demographic data)
+ ZIP Code of Current Location (GPS)
+ Find ZIP Codes of a City
+ ZIP Code Distance Calculator
+ ZIP Code Radius Finder
+ Locate a Post Office
ZIP Code Tools also has a handy history feature that keeps track of your searches and allows for easy recall when you need it.
** This is the app you wish you had, at that one time, remember? It's free, so just download it already. You will use it one day and be happy you had it.