How to Find the Postal Code for Any Korean Address
You have a Korean address — from a booking confirmation, a friend, or a shipping form — and you need its postal code. Here is the fastest reliable way, plus the pitfalls that cause failed deliveries.
Step 1: Identify the road name and building number
Every modern Korean address contains a road name and a number: 152 Teheran-ro, Gangnam-gu, Seoul or in Korean, 서울 강남구 테헤란로 152. That pair — road + number — is what determines the postal code.
Step 2: Search it
Type the road name and number into this site's search box — Korean or romanized both
work (테헤란로 152 or Teheran-ro 152). Building names work too
(국회의사당). The result page shows the 5-digit postal code,
the official English address, and the Korean address, each with a copy button.
Step 3: Copy the exact form you need
- Online checkout: postal code goes in the ZIP field; see our shipping form guide for the field-by-field mapping.
- Handwritten mail: postal code goes after the province, before the country name.
Pitfalls that cause delays
- Old 6-digit codes. Korea switched to 5 digits in August 2015. If a website shows a 6-digit Korean postal code, it is outdated.
- One road, many codes. Postal codes follow zone boundaries, not roads — a long road crosses several zones, so Teheran-ro 10 and Teheran-ro 500 have different codes. Always look up the full address including the building number.
- Neighborhood names (-dong) are not part of the address. If a listing says "Yeoksam-dong", that helps you find the district, but the deliverable address is the road + number form.
- Lot-number (jibun) addresses. Older listings may show something like Yeoksam-dong 737. Search that here and you'll get the modern road-name equivalent and its postal code.
Why this data is reliable
This site serves the address database published by the Korean Ministry of the Interior and Safety — the same source carriers and government systems use — covering every building in the country, refreshed monthly.