blackwall postcode nswst Home ›› Postcode Finder ›› NSWST ›› Blackwall Blackwall local listingsThe suburb of Blackwall is located in NSW and has a postcode of 2256. Free blackwall business listing! 1WSG Group15 Koonora Ave, Blackwall NSW 2256, Australia 1800 186 597 View more business listings in blackwall Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.