Home Postcodes by state TAS 7303 Postcode 7303 7303 is the postcode for 7 localities in TAS: Birralee, Cluan, Exton, Oaks, Osmaston, Westbury and 1 more. Localities with postcode 7303BirraleeTASCluanTASExtonTASOaksTASOsmastonTASWestburyTASWhitemoreTAS Postcode 7303 State or territory Tasmania (TAS) Localities 7 Council area Mainly Meander Valley, partly West Tamar; Meander Valley Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 7302 · Postcode 7304