Home Postcodes by state TAS 7187 Postcode 7187 7187 is the postcode for Koonya, TAS. Localities with postcode 7187KoonyaTAS Postcode 7187 State or territory Tasmania (TAS) Localities 1 Council area Tasman Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 7186 · Postcode 7190