Home Postcodes by state TAS 7021 Postcode 7021 7021 is the postcode for Lauderdale, TAS. Localities with postcode 7021LauderdaleTAS Postcode 7021 State or territory Tasmania (TAS) Localities 1 Council area Clarence Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 7020 · Postcode 7022