Home Postcodes by state NSW 2427 Postcode 2427 2427 is the postcode for 2 localities in NSW: Crowdy Head and Harrington. Localities with postcode 2427Crowdy HeadNSWHarringtonNSW Postcode 2427 State or territory New South Wales (NSW) Localities 2 Council area Mid-Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2426 · Postcode 2428