From Aaron Swartz’s Google Blog:
Gary Price points out that in their quest to become the command line of the Internet, Google has added several new features: you can now enter UPS (1Z1234567891234567) and FedEx (fedex 999999999999), patent (patent 5123123), airplane (n199ua), and FCC equipment (fcc B4Z-34009-PIR) ID/tracking numbers. Fun stuff.
Area Codes, e.g. 650, bring up maps. UPC codes, e.g. 073333531084 or 036000250015, bring up some information about the product. Flight numbers, e.g. usair 50, provide links to flight tracking Vehicle ID (VIN) numbers, e.g. JH4NA1157MT001832, link to a CARFAX report on what kind of car and its status. U.S. Postal Service tracking numbers link to package status.