sylvania-southgate postcode nswrv Home ›› Postcode Finder ›› NSWRV ›› Sylvania-Southgate Sylvania Southgate local listingsThe suburb of Sylvania Southgate is located in NSW and has a postcode of 2224. Free sylvania southgate business listing! Get the first free listing in sylvania southgate! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.