Zip Code Software
Q: Which software packages can be used to convert zip code entries into states?
Paul Albert, [email@example.com] recommends the following sites for the
do-it-yourselfer with the caveat that "All of the free zip code files on the Web use
old data" (covering 90% of today's zips). He is researching the best and cheapest way
to get new data.
Tracy Bryson, [firstname.lastname@example.org] recommends trying The US Postal Service: