I’m pleased to announce that the zip codes database for United States has been upgraded. It now contains more zip codes, nearly all of them, with nearly all the cities, states / territories / military forces. And best of all, each zip code record also comes with the phone number area code, time zone and DST.
Please see details here: http://www.thedataplanet.com/databases/uszip-database.html
Samples can be found here: http://www.thedataplanet.com/sample/uszip/