Reduce the list, select first 2 letters of the city:
Listing cities (35 place(s)). Select the City to see the postcode(s):
Listing cities (35 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Germany > Schleswig-Holstein > O.... >
Postcode finder: Germany, List of the cities starting with O. Germany Schleswig-Holstein Postcodes (Desktop version).