United States ZIP Code Database (Basic Edition) as the name suggests is a repository of important geographic information.
Zip code information is vital for educational as well as corporate organizations. You might need to find the corresponding state names, phone area code and the city name to a given zip code. All this data is properly maintained and provided in the database of this program. The complete database has over 42000 precise records which is comprehensive information to anybody seeking geographic information. You can easily download in ASCII text, Microsoft Excel, Microsoft Access and dBASE V formats. View the data on a simple excel sheet. As all this is distributed over the Internet, the prices are low and reasonable. You can order for your one year subscription.
Download the sample database first to get an idea of what the complete database could provide you.