Home Postcodes by state ACT 2903 Postcode 2903 2903 is the postcode for 3 localities in ACT: Oxley, Wanniassa and Erindale Centre. Localities with postcode 2903Erindale CentreACTOxleyACTWanniassaACT Postcode 2903 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 2902 · Postcode 2904