known as the ZIP Code with five digits ”’99999*”’ or the ZIP+4 Code with nine digits ”’99999-9999*”’ (while the minimum requirement is the first five digits, the U.S. Postal Service encourages everyone to use all nine). Also used by the former US Pacific Territories: Federated States of Micronesia; Palau; and the Marshall Islands, as well as in current US territories American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and the US Virgin Islands.
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