Postal codes in Thailand

The first two digits of the postal code denote the province or special administrative area (e.g., 43120 Phon Phisai, Nong Khai), while the last 3 digits represent the post office within the province.

It is typical to use postal code ended with zero 0 because they are assigned to post office that are responsible for delivering mail to the district (amphoe or khet).

[3] 10300 is postal code of Dusit Post Office which handles the delivery throughout Dusit district while 10303 is postal code of Chitralada Palace Post Office which does not deliver mails outside the palace.

[2] Listed below are the first 2 digits of codes assigned to each province or special administrative area.

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