| Regions
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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.
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| Time Zone
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Time zone in hours later (+) than UTC. Daylight saving time not included.
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| Postal Code
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Indonesian postal codes (Sistem Kode Pos Indonesia, SKPI) are five digits. The first two digits determine the province, as shown above.
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