Home Postcode finder NSW Blackett Blackett postcode NSW Blackett is a locality in New South Wales covered by postcode 2770. Postcode 2770 State or territory New South Wales (NSW) Region Nepean Add a free Blackett business listing More business listings in Blackett Businesses in BlackettBlackett Public SchoolBoldrewood Rd · 02 96287760Niland Special SchoolNiland Crescent · 02 96286885 Common questionsWhat is the postcode for Blackett?Blackett, NSW has the postcode 2770.What state is Blackett in?Blackett is in New South Wales (NSW).Does postcode 2770 cover more than one suburb?Yes. Postcode 2770 covers 13 localities, so the postcode alone does not identify Blackett. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.