"Post code" redirects here. For computer POST codes, see Power-on self-test.
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A postal code (also known locally in various English-speaking countries throughout the world as a postcode, post code, PIN or ZIP Code) is a series of letters or digits or both, sometimes including spaces or punctuation, included in a postal address for the purpose of sorting mail.
As of August 2021,[ref] the Universal Postal Union lists 160 countries which require the use of a postal code.[1]
Although postal codes are usually assigned to geographical areas, special codes are sometimes assigned to individual addresses or to institutions that receive large volumes of mail, such as government agencies and large commercial companies. One example is the French CEDEX system.
^"Addressing knowledge centre", General Addressing Issues(PDF), Universal Postal Union, 3 August 2021, retrieved 1 June 2022
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