Home Postcodes by state QLD 4673 Postcode 4673 4673 is the postcode for 3 localities in QLD: Miara, Waterloo and Yandaran. Localities with postcode 4673MiaraQLDWaterlooQLDYandaranQLD Postcode 4673 State or territory Queensland (QLD) Localities 3 Council area Bundaberg Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4671 · Postcode 4674