I should have been more clear. We will have a database of several hundred thousand businesses across the nation, all within a certain industry. A column in the database will be zip code. On the website, a user will enter their zip code ina text box and choose the distance from a drop down menue. We will return all the businesses that fall within that distance. I am guessing there is a third party tool or, better yet, a web service that will assist in this process. I have found a few things via Google that come close, but nothing that nails this need exactly. Anyone had experiecne with this, or know where to look? Thanks, Casey -----Original Message---- We've all seen the tools that allow you to search for a business within 10, 50, 100, 500 miles of a given zip code. Can anyone point me in the direction of how this is done? We have not yet determined if the site will be in PHP or .NET, so we are open to all suggestions.