the zip in zip code stands for zone improvement plan.
the zip in zip code stands for zone improvement plan.
what does the zip in zip code stand for?
zone improvement plan
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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.
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list of zip code prefixes









































this is a list of zip code prefixes. each cell in this table contains a three-digit zip code prefix, the state where that zip code prefix is located, and the name of the united states postal service (usps) sectional center facility (scf) that serves that zip code prefix, which may be in a different state. each scf may serve more than one three-digit zip code prefix. each scf serves local addresses whose five-digit zip codes start with the same set of prefixes.
list of zip code prefixes