Gangnam-ro, Geochang-eup, Geochang-gun postal codes (118)
On Gangnam-ro in Geochang-eup, Geochang-gun the postal code depends on the building number: numbers 14–72 use 50142, numbers 78–128-1 use 50143, numbers 140–180 use 50144, and 2 more ranges. Data as of August 2026.