Home Postcodes by state NSW 2405 Postcode 2405 2405 is the postcode for 2 localities in NSW: Boomi and Garah. Localities with postcode 2405BoomiNSWGarahNSW Postcode 2405 State or territory New South Wales (NSW) Localities 2 Council area Moree Plains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2404 · Postcode 2406