Home Postcode finder VIC Rainbow Rainbow postcode VIC Rainbow is a locality in Victoria covered by postcode 3424. Postcode 3424 State or territory Victoria (VIC) Region Vic Far Country Add a free Rainbow business listing More business listings in Rainbow Businesses in RainbowRainbow Primary School30 Bow St · 03 53951460Rainbow Secondary College17 Albert St · 03 53951063 Common questionsWhat is the postcode for Rainbow?Rainbow, VIC has the postcode 3424.What state is Rainbow in?Rainbow is in Victoria (VIC).Does postcode 3424 cover more than one suburb?Yes. Postcode 3424 covers 3 localities, so the postcode alone does not identify Rainbow. Browse other postcodes in Victoria, or widen the search to every Australian postcode.