Postal codes in Indonesia explained

Postal codes in Indonesia, known in Indonesian as kode pos consist of 5 digits.

• The first digit indicates the region in which a given post office falls in,
• The second and third digits indicate the regency (kabupaten) or city (kota madya),
• The fourth digit indicates the district or kecamatan within the kabupaten or kota,
• The fifth digit indicates the commune or village or kelurahan/desa.

There is an exception for Jakarta postal codes:^[1]

• The third digit indicates the district (kecamatan)
• The fourth digit indicates the urban village (kelurahan)
• The fifth digit is a "0".

There are postal code zones covering the Indonesian provinces or islands as follows:^[1]

First digit	Postal zone
1	Jakarta metropolitan area^[2]
2	Northern half of Sumatra, comprising the provinces of Aceh, North Sumatra, West Sumatra, Riau and Riau Islands.
3	Southern half of Sumatra, comprising the provinces of Bengkulu, Jambi, Bangka Belitung, South Sumatra and Lampung.
4	The provinces of Banten and West Java (except those parts within the Jakarta metropolitan area ^[3]).
5	The province of Central Java and the Yogyakarta Special Region.
6	The province of East Java.
7	Kalimantan (the Indonesian part of Borneo island).
8	The provinces of Bali, West Nusa Tenggara and East Nusa Tenggara (the Lesser Sunda Islands).
9	Sulawesi (Celebes), Maluku (Moluccas), and Papua (Western New Guinea).

Notes and References

1. https://kodepos.nomor.net/ Kode Pos Indonesia
2. The Java Metropolitan area comprises the Jakarta Special District, part of West Java Province (the cities of Bekasi, Bogor and Depok, and the regencies of Bekasi and Bogor) and part of Banten Province (the cities of Tangerang and South Tangerang, and the Tangerang Regency).
3. as defined in footnote 2