blackett postcode nswst Home ›› Postcode Finder ›› NSWST ›› Blackett Blackett local listingsThe suburb of Blackett is located in NSW and has a postcode of 2770. Free blackett business listing! 1Niland Special SchoolNiland Crescent 02 962868852Blackett Public SchoolBoldrewood Rd 02 96287760 View more business listings in blackett Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.