Reduce the list, select first 2 letters of the city:
Listing cities (66 place(s)). Select the City to see the postcode(s):
Listing cities (66 place(s)). Select the City to see the postcode(s):
Position: Postcodes > New Zealand > H.... >
Postcode finder: New Zealand, List of the cities starting with H. New Zealand Postcodes (Desktop version).