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  4. Postal Code 31123

South Korea Postal Code 31123 Boundary Map

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Postal Code31123
Postal Code NameCheonan-si
ProvinceChungcheongnam-do
CountyCheonan-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes31119
31120
31121
31122
31124
31125
31126
31127
31128

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