Launch your Internet browser and navigate to Google Maps. This is the only fully searchable map service available for free online.
In the search box, type the name of the city, followed by "South Korea,"-- then hit "Enter" or click "Search." The map will automatically move to that city. For example, typing in "Incheon, South Korea" will bring up a satellite view of the city. You can zoom in and out using the "+" and "-" signs on the left side.
Locate cities whose names you do not know by typing "South Korea" into the search bar. This will bring up a view of the whole country. You can then click and drag the map to move around it. Zooming-in lets you see the names of smaller towns that do not appear when you look at the whole country.
Gather information about the destination address. You will need to know the metropolitan area -- such as Seoul. Seoul region -- for example, has dozens of sub-cities -- and the dong or local zone. Each zone has its own postal code.
Visit the Geopostcodes website where there is a searchable English database of South Korean postal codes.
Click on the name of the metropolitan area your destination is in.
Click on the city name.
Look at the resulting list of postal codes. These are divided by local zone -- or dong. Next to each entry on the list there is a small globe icon. Click it to see that postal code on the map, and match it with the area you want to find.
