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  4. Postal Code 28431

South Korea Postal Code 28431 Boundary Map

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Postal Code28431
Postal Code NameCheongju-si
ProvinceChungcheongbuk-do
CountyCheongju-si
TimezoneKorean Standard Time (KST)
Adjacent Postal Codes28430
28432
28435
28436
28441
28442
28443

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