Home Postcodes by state QLD 4424 Postcode 4424 4424 is the postcode for 3 localities in QLD: Drillham, Drillham South and Glenaubyn. Localities with postcode 4424DrillhamQLDDrillham SouthQLDGlenaubynQLD Postcode 4424 State or territory Queensland (QLD) Localities 3 Council area Western Downs Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4423 · Postcode 4425