Reduce the list, select first 2 letters of the city:
Listing cities (107 place(s)). Select the City to see the postcode(s):
Listing cities (107 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Australia > Western Australia > K.... >
Postcode finder: Australia, List of the cities starting with K. Australia Western Australia Postcodes (Desktop version).