The postal code of Onsan-eup which is listed in our database is 689-894. Our records often include geographical coordinates of Onsan-eup and it's corresponding postal code.
In the result box below, you can find the postal code of Onsan-eup and it's location on the map if we have the location information available.
Every postal code is also located in a region or a district, in case we know the district or region of the city it will too be listed in the results.
All kinds of additional information we have on Onsan-eup may also be present such as geographical data, historical records or news about Onsan-eup and 689-894 in general.