Thanks for the class Dan, this is probably what I'm looking for but will need to port it over to ASP/SQL. The only con with this class is that occassionally the SQL table for the zips will have to be updated manually and I won't know where to begin with that. I'm not sure if this will be an issue or not, however the radius search will be used on a realty site where property is being developed all the time, all over the show. Are there any alternative solutions out there? Otherwise I think this is a good idea. Peter ----- Original Message ----- From: "Dan McCullough" <dan.mccullough at gmail.com> To: <thelist at lists.evolt.org> Sent: Thursday, July 21, 2005 9:18 PM Subject: Re: [thelist] Proximity/Radius searching? Here is a zip code range and distance calculation class. http://www.micahcarrick.com/v2/content/view/4/3/ let me know if thats what you are looking for.