Gjennomsnittlig GPS-koordinater for postnummer 21155: 3.123, 99.161
Notering byer:
>> Dolok Batu Nanggar 21155, North Sumatra, Simalungun, GPS-koordinater: 3.12272,99.16057
Notering byer:
>> Dolok Batu Nanggar 21155, North Sumatra, Simalungun, GPS-koordinater: 3.12272,99.16057