Prosečne GPS koordinate za poštanski broj 121-820: 37.554, 126.902

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Spisak gradova:
>> Mangwon 1(il)-dong/망원1동 121-820, Seoul/서울, Mapo-gu/마포구, 301-383/301-383, GPS koordinate: 37.55415,126.90166
>> Mangwon 1(il)-dong/망원1동 121-820, Seoul/서울, Mapo-gu/마포구, 400-402/400-402, GPS koordinate: 37.55417,126.90168
>> Mangwon 1(il)-dong/망원1동 121-820, Seoul/서울, Mapo-gu/마포구, 50-199/50-199, GPS koordinate: 37.5542,126.90171