Prosečne GPS koordinate za poštanski broj 405-818: 37.394, 126.705
Spisak gradova:
>> Gojan-dong/고잔동 405-818, Incheon/인천, Namdong-gu/남동구, 650-666/650-666, GPS koordinate: 37.3937,126.70512
Spisak gradova:
>> Gojan-dong/고잔동 405-818, Incheon/인천, Namdong-gu/남동구, 650-666/650-666, GPS koordinate: 37.3937,126.70512