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  4. Postal Code 28423

South Korea Postal Code 28423 Boundary Map

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Postal Code28423
Postal Code NameCheongju-si
ProvinceChungcheongbuk-do
CountyCheongju-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes28390
28391
28421
28422
28426
28584
28585
28598

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