Postal codes in Taiwan
postal code system

Postal codes in Taiwan (Chinese: 郵遞區號; pinyin: Yóudì qūhào; Pe̍h-ōe-jī: Iû-tē khu-hō) is a system of three plus three (3+3) numeral digits used by Chunghwa Post, the government-owned postal service in Taiwan.
The first three digits of postal codes mainly correspond to the 368 townships, county-administered cities, and districts in Taiwan. However, the districts under the cities of Chiayi and Hsinchu share a single code. In addition, the published table includes 3 island entries in addition to administrative divisions: Tungsha (Pratas Island), Nansha (Spratly Islands), and Tiaoyutai (Senkaku Islands). These brings the total three digit postal codes in use to 368.
Omitting the supplementary three digits is ordinarily acceptable, especially for general public, while using a six-digit code is expected for corporate customers who send large-volume mails, which will speed the delivery of the mail.
History
In the 1960s, unified postal code systems have been developed in different countries to improve the process of automatic mail sorting machines. These include ZIP Codes of United States Postal Service (5 numeral digits) and Postal codes in Japan (3+2 numeral digits).
On March 20, 1970 the first table of three (3) numeral digit Taiwanese postal codes are announced by the Directorate General of Posts, Ministry of Transportation and Communications (then Chunghwa Post).
On July, 1 1985, the Directorate General of Posts extends the postal code plan to three plus two (3+2) numeral digits.
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