Gjennomsnittlig GPS-koordinater for postnummer 20357: 3.314, 98.574
Notering byer:
>> Sibolangit 20357, North Sumatra, Deli Serdang, GPS-koordinater: 3.31431,98.57393
Notering byer:
>> Sibolangit 20357, North Sumatra, Deli Serdang, GPS-koordinater: 3.31431,98.57393