Gjennomsnittlig GPS-koordinater for postnummer 20992: 3.158, 99.009
Notering byer:
>> Sipispis 20992, North Sumatra, Serdang Bedagai, GPS-koordinater: 3.1578,99.0086
Notering byer:
>> Sipispis 20992, North Sumatra, Serdang Bedagai, GPS-koordinater: 3.1578,99.0086