Home Postcodes by state ACT 2900 Postcode 2900 2900 is the postcode for 2 localities in ACT: Greenway and Tuggeranong. Localities with postcode 2900GreenwayACTTuggeranongACT Postcode 2900 State or territory Australian Capital Territory (ACT) Localities 2 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 2899 · Postcode 2902