JSON Metadata: Postcode Finder API documentation
Use the NZ Address Finder to locate the right postcode for an address.
Postcodes areas are defined by NZ Post and suburbs are defined by local councils and Land Information New Zealand. A suburb can span across multiple postal code boundaries and multiple suburbs can also share the post code.
As shown on the google street map image, the property in Kitchener Road is on the postcode boundary between Takapuna (0622) and Milford (0620). The postcode for the address is 0620 (Milford) but the suburb is Takapuna.
New Zealand uses a unique 4-digit postcode, defined by NZ Post to help identify the region, city and suburb used for mail deliveries.
Using a service such as a NZ post code finder will validate that an accurate postcode was entered to reduce delays caused by returned mail or multiple re-deliveries.
Fuzzy postcode searching is used for returning accurate post codes even when city or suburb filters are entered with spelling mistakes and typos.