Gjennomsnittlig GPS-koordinater for postnummer 21321: 2.965, 99.8
Notering byer:
>> Tanjung Balai Kota III 21321, North Sumatra, Tanjung Balai, GPS-koordinater: 2.96506,99.80027
Notering byer:
>> Tanjung Balai Kota III 21321, North Sumatra, Tanjung Balai, GPS-koordinater: 2.96506,99.80027