South Korea Postal Code Lookup
Enter a South Korea postal code to check its format, view area-level sample data, and generate a fictional test address for that area.
03154 Synthetic test address for this area
6630, Jongno-gil Jongno-gu Seoul 03154 South Korea
South Korea postal code format notes
South Korea uses five-digit postal codes. These samples do not claim road-level compatibility.
Can a postal code show a specific address?
Usually no. A postal code typically identifies a postal area, locality, or delivery range. It should not be presented as a specific street and house number without licensed address data.
Format references
Last reviewed: 2026-06-27 · format-only
- Korea Post — English address labelling — Korea Post
- Korea Post — postal-code system — Korea Post
South Korea postal code lookup FAQ
Can a South Korean postal code show a specific street address?
Usually no. A South Korean postal code typically identifies a postal area, locality, or administrative region. It should not be treated as a specific street and house number.
Is this postal lookup official delivery verification?
No. This tool uses GeoNames area-level postal data and local samples for format learning, QA, and test data. It does not guarantee deliverability.
Why can a valid postal code return no area result?
Format validation only checks the visible structure. Area results depend on the current dataset coverage; unmatched values are shown as format-only results.
Can I generate a test address from a postal lookup result?
Yes. When an area-level match is found, the page can generate a fictional test address for forms, imports, and development workflows. It is not a real address claim.