Keskimääräinen GPS-koordinaatit postinumero 355-911: 36.302, 126.647

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Listatut kaupungit:
>> Seongju-myeon/성주면 355-911, Chungcheongnam-do/충남, Boryeong-si/보령시, Gaehwari/개화리, GPS-koordinaatit: 36.30154,126.64719
>> Seongju-myeon/성주면 355-911, Chungcheongnam-do/충남, Boryeong-si/보령시, Seongju ri 7/성주7리, GPS-koordinaatit: 36.30149,126.64714
>> Seongju-myeon/성주면 355-911, Chungcheongnam-do/충남, Boryeong-si/보령시, Seongju ri 8/성주8리, GPS-koordinaatit: 36.30157,126.64722