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  4. Postal Code 28731

South Korea Postal Code 28731 Boundary Map

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Postal Code28731
Postal Code NameCheongju-si
ProvinceChungcheongbuk-do
CountyCheongju-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes28729
28730
28732
28740
28741
28763
28765

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