Features games and product news, and list of codes for Playstation 2, Xbox, Game Cube, and handhelds.
  http://www.codejunkies.com  [Site Details]

Each California Code can be searched individually, or collectively by checking the 'All' category.
  http://www.leginfo.ca.gov/calaw.html  [Site Details]

Look up a zip code by address, city and State.
  http://www.usps.com/zip4/  [Site Details]