Home Postcodes by state VIC 3638 Postcode 3638 3638 is the postcode for 3 localities in VIC: Kotupna, Nathalia and Yielima. Localities with postcode 3638KotupnaVICNathaliaVICYielimaVIC Postcode 3638 State or territory Victoria (VIC) Localities 3 Council area Moira Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3637 · Postcode 3639