Each code consists of two parts, separated by a hyphen. The first part is KH, the ISO 3166-1 alpha-2 code of Cambodia. The second part is a number. The digits are currently used in postal codes, except for codes 1-9, for which one must include 0 before the number (1 becomes 01) to get the postal code from the ISO code:
1–21: autonomous municipalities and provinces as of late 1980s
22–25: autonomous municipalities and province created since the 1990s
Current codes
Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).
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^For reference only, Khmer name in Khmer script not included in the ISO 3166-2 standard.
Changes
The following changes to the entry have been announced by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998. ISO stopped issuing newsletters in 2013.
Change of subdivision name of KH-18, KH-23, KH24; Correction of the romanization system label; Addition of local variation of KH-01, KH-02, KH-03, KH-05, KH-06, KH-08, KH-09, KH-10, KH-11, KH-14, KH-15, KH-16, KH-17, KH-18, KH-19, KH-20, KH-21, KH-22, KH-23