Home Postcode finder VIC Langwarrin South Langwarrin South postcode VIC Langwarrin South is a locality in Victoria covered by postcode 3911. Postcode 3911 State or territory Victoria (VIC) Region Frankston Add a free Langwarrin South business listing More business listings in Langwarrin South Businesses in Langwarrin SouthBayside Christian College120-128 Robinsons Rd · 03 59712978Mr Drains63 Highfield Road · 0437 24 6700P-Trap Plumbing95 Weeroona Rd · 0410 042 791 Common questionsWhat is the postcode for Langwarrin South?Langwarrin South, VIC has the postcode 3911.What state is Langwarrin South in?Langwarrin South is in Victoria (VIC).Does postcode 3911 cover more than one suburb?Yes. Postcode 3911 covers 2 localities, so the postcode alone does not identify Langwarrin South. Browse other postcodes in Victoria, or widen the search to every Australian postcode.