Home Postcode finder NSWRV East Seaham East Seaham postcode NSWRV East Seaham is a locality in New South Wales covered by postcode 2324. Postcode 2324 State or territory New South Wales (NSWRV) Region Hunter Add a free East Seaham business listing Be the first listing in East Seaham Common questionsWhat is the postcode for East Seaham?East Seaham, NSWRV has the postcode 2324.What state is East Seaham in?East Seaham is in New South Wales (NSWRV).Does postcode 2324 cover more than one suburb?Yes. Postcode 2324 covers 22 localities, so the postcode alone does not identify East Seaham. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.