Home Postcode finder VIC Rocklyn Rocklyn postcode VIC Rocklyn is a locality in Victoria covered by postcode 3364. Postcode 3364 State or territory Victoria (VIC) Region Vic Far Country Add a free Rocklyn business listing Be the first listing in Rocklyn Common questionsWhat is the postcode for Rocklyn?Rocklyn, VIC has the postcode 3364.What state is Rocklyn in?Rocklyn is in Victoria (VIC).Does postcode 3364 cover more than one suburb?Yes. Postcode 3364 covers 23 localities, so the postcode alone does not identify Rocklyn. Browse other postcodes in Victoria, or widen the search to every Australian postcode.