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. The basic format consists of five digits. An extended ZIP+4 code was introduced in the 1980s which includes the five digits of the ZIP code, a hyphen, and four more digits that identify a specific segment of the ZIP code.
The mail service in Indonesia uses four-digit postal …