Could be a programming head-hunter site using affiliate links to various job placement services and/or developed with a simple blog where programmers, etc could seek work, trade programming tips, etc.
In regards to postal use - be aware that "zip code" is a well known feature* of the U.S. Postal Service...
*Note that I said feature, not TM because it doesn't appear the US Postal Service has enforced their mark - the registration (at least the one I could find) expired in 1997 and numerous exact and similar marks have long been in use, including in the postal field. So it's a minor issue, in my view, but one to be aware of nevertheless.
Ron