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  4. Postal Code 31137

South Korea Postal Code 31137 Boundary Map

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Postal Code31137
Postal Code NameCheonan-si
ProvinceChungcheongnam-do
CountyCheonan-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes31134
31135
31136
31138
31142
31143

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