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  4. Postal Code 31111

South Korea Postal Code 31111 Boundary Map

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Postal Code31111
Postal Code NameCheonan-si
ProvinceChungcheongnam-do
CountyCheonan-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes31079
31080
31084
31103
31104
31112
31114

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