Gjennomsnittlig GPS-koordinater for postnummer 20621: 3.323, 99.154

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Notering byer:
>> Durian 20621, North Sumatra, Tebing Tinggi, GPS-koordinater: 3.32456,99.15326
>> Pelita 20621, North Sumatra, Tebing Tinggi, GPS-koordinater: 3.32107,99.15457