Home Postcodes by state VIC 3074 Postcode 3074 3074 is the postcode for Thomastown, VIC. Localities with postcode 3074ThomastownVIC Postcode 3074 State or territory Victoria (VIC) Localities 1 Council area Whittlesea Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3073 · Postcode 3075