Prosečne GPS koordinate za poštanski broj 631-600: 35.197, 128.568
Spisak gradova:
>> Masanhappoucheguksaseoham/마산합포우체국사서함 631-600, Gyeongsangnam-do/경남, Masan-si/마산시, GPS koordinate: 35.19678,128.56798
Spisak gradova:
>> Masanhappoucheguksaseoham/마산합포우체국사서함 631-600, Gyeongsangnam-do/경남, Masan-si/마산시, GPS koordinate: 35.19678,128.56798