dungog postcode nswrv Home ›› Postcode Finder ›› NSWRV ›› Dungog Dungog local listingsThe suburb of Dungog is located in NSW and has a postcode of 2420. Free dungog business listing! 1Dungog High School126 Eliza St 02 499230222Dungog Public School11 Chapman St 02 499213843St Joseph's School49 Brown St 02 49921377 View more business listings in dungog Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.