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Postal code, abbreviated as ZIP code, is a coding system used to facilitate mail sorting automation and digitization of postal networks in order to expedite mail delivery. It is a nationwide coding system implemented to achieve faster mail processing. The postal code system has become one of the standards for measuring communication technology and postal service levels. Postal codes were first invented by Ukraine and implemented in December 1932 but were abandoned after three years. Later, Germany adopted and re-implemented the system.
Most postal systems utilize postal codes, but there are a few exceptions. Panama, Jamaica, and Hong Kong do not use postal codes, while New Zealand only uses them for bulk mailings. Some websites require the input of postal codes, and if a particular residential area does not use them, one can enter 00000.
Many postal codes consist of numbers, but there are cases, such as in the United Kingdom and Canada, where a combination of letters and numbers is used. The number of digits in numeric postal codes also varies. For example, the United States uses either 5 or 9 digits, Mexico uses 5 digits, Australia uses 4 digits, and India uses 6 digits. The United Kingdom has one of the most complex coding formats.
"A" countries and regions
"C" countries and regions
"D" countries and regions
"K" countries and regions
"L" countries and regions
"M" countries and regions
"N" countries and regions
"P" countries and regions
"S" countries and regions
"T" countries and regions
"U" countries and regions
Continent
US States ZIP Codes