Prosečne GPS koordinate za poštanski broj 404-821: 37.605, 126.669
Spisak gradova:
>> Majeon-dong/마전동 404-821, Incheon/인천, Seo-gu/서구, 657-900/657-900, GPS koordinate: 37.60485,126.66873
Spisak gradova:
>> Majeon-dong/마전동 404-821, Incheon/인천, Seo-gu/서구, 657-900/657-900, GPS koordinate: 37.60485,126.66873