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  4. Postal Code 28421

South Korea Postal Code 28421 Boundary Map

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Postal Code28421
Postal Code NameCheongju-si
ProvinceChungcheongbuk-do
CountyCheongju-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes28415
28416
28420
28422
28423
28426
28427
28584

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