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  4. Postal Code 31221

South Korea Postal Code 31221 Boundary Map

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Postal Code31221
Postal Code NameCheonan-si
ProvinceChungcheongnam-do
CountyCheonan-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes30000
31214
31216
31217
31218
31222
31499
31582

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