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  4. Postal Code 31121

South Korea Postal Code 31121 Boundary Map

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Postal Code31121
Postal Code NameCheonan-si
ProvinceChungcheongnam-do
CountyCheonan-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes31117
31118
31120
31122
31123
31136
31143
31144

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