Generate random United States zip codes for your testing and development needs!
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ZIP Codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, was chosen to suggest that the mail travels more efficiently and quickly when senders use the code in the postal address.
The basic format consists of five numerical digits. An extended ZIP+4 code includes the five-digit ZIP Code, a hyphen, and four additional digits that determine a more specific location within a ZIP Code.