Home Postcodes by state QLD 4420 Postcode 4420 4420 is the postcode for 8 localities in QLD: Broadmere, Coorada, Ghinghinda, Glenhaughton, Gwambegwine, Hornet Bank and 2 more. Localities with postcode 4420BroadmereQLDCooradaQLDGhinghindaQLDGlenhaughtonQLDGwambegwineQLDHornet BankQLDSpring CreekQLDTaroomQLD Postcode 4420 State or territory Queensland (QLD) Localities 8 Council area Banana Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4419 · Postcode 4421