Home Postcodes by state ACT 2605 Postcode 2605 2605 is the postcode for 3 localities in ACT: Curtin, Garran and Hughes. Localities with postcode 2605CurtinACTGarranACTHughesACT Postcode 2605 State or territory Australian Capital Territory (ACT) Localities 3 Council area None: the ACT Government provides local services Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2604 · Postcode 2606