Home Postcode finder VIC Armstrong Armstrong postcode VIC Armstrong is a locality in Victoria covered by postcode 3377. Postcode 3377 State or territory Victoria (VIC) Region Vic Far Country Add a free Armstrong business listing Be the first listing in Armstrong Common questionsWhat is the postcode for Armstrong?Armstrong, VIC has the postcode 3377.What state is Armstrong in?Armstrong is in Victoria (VIC).Does postcode 3377 cover more than one suburb?Yes. Postcode 3377 covers 20 localities, so the postcode alone does not identify Armstrong. Browse other postcodes in Victoria, or widen the search to every Australian postcode.