Zip Code Radius Search module is an addon to program which can be used in multiple ways: as classifieds system, online inventory management system, business/community portal, yellow pages or even light content management script (CMS). This module allows you to add proximity search easily to existing search forms. You enter zip code, select max. distance from it (miles/kilometers) and get matching ads returned by search engine ! USA zip codes database is offered, any other postal codes DB with lattitude/longitude information can be integrated (Canada, Mexico, etc)