[GENERAL] Zip Code Proximity

[Andy Lewis]

Hello All,

I know there's been quite a few posts on Zip Code Proximity.

Can anyone point me in the right direction to find the code to calulate
the distance between two zip codes?

I'm basically trying to take a zip code given by a user and return them
all of the zip codes within, say 10 miles or 20 miles.

I've tried the mailing list search but, they seem to be down or not
available.

Thanks

Andy