|| These regions are adapted from the geographical units described in ISO 3166-2. Except for Aceh and Jakarta, which have been added here, these regions represent the major islands or island groups of Indonesia.
|| Time zone in hours later (+) than UTC. Daylight saving time not included.
|| Indonesian postal codes (Sistem Kode Pos Indonesia, SKPI) are five digits. The first two digits determine the province, as shown above.