Home Postcode finder WA Northbridge Northbridge postcode WA Northbridge is a locality in Western Australia covered by postcode 6003. Postcode 6003 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Northbridge business listing More business listings in Northbridge Businesses in NorthbridgeAlma Dental6/400 Fitzgerald Street, Northbridge WA, Australia · 892276468Ambassador Bar59 Aberdeen Street, Northbridge WA 6003, Australia · 0000000000Bam Creative3/385 Newcastle St, Northbridge WA 6003, Australia · (08) 9228 2233 Common questionsWhat is the postcode for Northbridge?Northbridge, WA has the postcode 6003.What state is Northbridge in?Northbridge is in Western Australia (WA).Does postcode 6003 cover more than one suburb?Yes. Postcode 6003 covers 2 localities, so the postcode alone does not identify Northbridge. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.