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ZIP+4 code

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Definition Edit

The ZIP+4 Code consists of the original 5-digit ZIP code plus a 4-digit add-on code that identifies a geographic segment within the 5-digit delivery area, such as a city block, office building, individual high-volume receiver of mail, or any other unit that would aid efficient mail sorting and delivery.[1]

References Edit

  1. See U.S. Postal Service, Frequently Asked Questions, ZIP Code Information (full-text) (search “ZIP Code Information”; then follow “ZIP Code Information” hyperlink).

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