Zip + Post codes
What are some interesting input tests for zipcodes?

US Zipcodes

  • 00501
    • Lowest ZIP
    • Holtsville, NY
    • Also detects fields that might truncate leading zeros
  • 99950
    • Highest ZIP
    • Ketchikan, AK
  • 06390
    • NY ZIP that Belongs in Connecticut?
    • Fishers Island, NY.
  • 12345
    • General Electric’s Unique ZIP
    • Schenectady, NY.
  • 20252
    • Smokey Bear’s Personal ZIP
    • Washington, DC.
  • 22313
    • P.O. box only ZIP
    • Alexandria, Virginia.
  • 99530-9998
    • ZIP for Santa Claus in the north pole.
    • Anchorage, AK.

Non-US Postal Codes

  • H0H 0H0
    • Post Code for North Pole
    • North Pole, Canada
  • LL61 5QH
    • Post Code for Llanfair­pwllgwyngyll­gogery­chwyrn­drobwll­llan­tysilio­gogo­goch
    • Sometimes abbreviated to Llanfairpwllgwyngyll
    • Wales, UK

Zipcode Formats

  • 5 digits (ZIP)
    • 99530
  • 9 digits (ZIP + 4)
    • 995309998
  • 10 digits (ZIP + "-" + 4)
    • 99530-9998