CF_ZipCodeCF_Zipcode will allow you to take a zip code passed from a user and return all of the zip codes found within the radius specified by the user. The purpose of this code is to be allow you to easily tie this code into your database so that you can return all of the records within your database that match the submitted radius and zip code.
Included in the download is a Full Test zip code database. I do not know how old the zipcode database is but is what was used in the testing of this code. And at the time of creation this database was a complete zip code database.