A Korean address ending in a neighborhood name and a lot number may be a jibun address (지번주소). If a form asks for an English street address, look up the matching road-name address (도로명주소). Translating the neighborhood and putting the lot number in “House number” can point to a different building.
One location, two numbers
A Seoul municipal facilities record lists a City Hall site at both 중구 태평로1가 31번지 and 중구 세종대로 110. 31 identifies the land parcel; 110 is the building number on Sejong-daero. The Seoul Metropolitan Library guide gives the street as 110 Sejong-daero. The city’s website gives the postcode as 04524. On a form with separate fields, the street line is 110 Sejong-daero, the district is Jung-gu, and the city is Seoul. Don’t swap in 31 or drop the zero from the postcode.
For an address of your own:
- Search the official Korean address portal using the Korean neighborhood or village name and the full lot number. Keep a hyphenated subnumber if present. Leave the apartment block and room out of this first search.
- Match the district and lot, and check the building name if you have it. Copy the English road address and the postcode for that result. If two candidates still fit, ask the recipient for their current road address before choosing.
- If the checkout has a separate House number box, put the road address’s building number there and the road name in Street. If there is one street line, keep the two together.
The lookup found the building. Where is the apartment?
Look at what follows the base address in the recipient’s original. A neighborhood name ending in 동 belongs to the location lookup. But in the separate, fictional fragment 203동 804호, 203동 is apartment block 203 and 804호 is unit 804. In an apartment or suite field, enter 203-dong 804-ho. These numbers have no connection to the City Hall example. If the form takes a single full English address, the ministry’s English guide places the unit details before the building number and road name.
Korea Post’s address form separates address selection from apartment details. It allows a room number without a block when there is no block. A postcode match won’t identify someone’s room: ask for missing details rather than inventing a block or inferring a floor. After saving, reopen the address. The street number should still be attached to the road, and each apartment detail the recipient gave you should appear once. If the form drops a required detail, ask the merchant how to retain it before ordering.
Testing a checkout? The Korean address generator supplies Hangul samples for form tests. Use the official lookup to match an actual parcel to a street address.