Home Postcode finder NSWRV Duval Duval postcode NSWRV Duval is a locality in New South Wales covered by postcode 2350. Postcode 2350 State or territory New South Wales (NSWRV) Region NSW North Coast Add a free Duval business listing Be the first listing in Duval Common questionsWhat is the postcode for Duval?Duval, NSWRV has the postcode 2350.What state is Duval in?Duval is in New South Wales (NSWRV).Does postcode 2350 cover more than one suburb?Yes. Postcode 2350 covers 25 localities, so the postcode alone does not identify Duval. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.