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