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  4. Postal Code 28721

South Korea Postal Code 28721 Boundary Map

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Postal Code28721
Postal Code NameCheongju-si
ProvinceChungcheongbuk-do
CountyCheongju-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes28717
28719
28720
28722
28723
28726

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