Reduce the list, select first 2 letters of the city:
Listing cities (24 place(s)). Select the City to see the postcode(s):
Listing cities (24 place(s)). Select the City to see the postcode(s):
Position: Postcodes > South Korea > Incheon/인천 > H.... >
Postcode finder: South Korea, List of the cities starting with H. South Korea Incheon/인천 Postcodes (Desktop version).