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  • List of ZIP Code prefixes

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  • ZIP Code

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    A ZIP Code is a postal code used by the United States Postal Service (USPS) in a system it introduced in 1963. The term ZIP is an acronym for Zone Improvement Plan; it was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address. The basic format consists of five digits. An extended ZIP+4 code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that reference a more specific location. The term ZIP Code was originally registered as a servicemark by the U.S. Postal Service, but its registration has since expired.

  • List of ZIP Code prefixes

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