Introduced on July 1, 1963, the basic format comprised five digits. ... In 1983, an extended code was introduced named ZIP+4 ; it included the five digits of the ...
The ZIP code is the system of postal codes used by the United States Postal Service (USPS). The letters ZIP is an acronym for Zone Improvement Plan.
List of ZIP Code prefixes ... ZIP codes are numbered with the first number representing a certain group of U.S. states. The second and third numbers represent a ...
This list shows an overview of postal code notation schemes for all countries that have postal or ZIP Code systems.
This map of the United States divides the country into ZIP code zones. All states with a common colour use ZIP codes starting with the same digit. Each string ...
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