Home Postcodes by state WA 6275 Postcode 6275 6275 is the postcode for 10 localities in WA: Barrabup, Carlotta, Cundinup, Darradup, East Nannup, Jalbarragup and 4 more. Localities with postcode 6275BarrabupWACarlottaWACundinupWADarradupWAEast NannupWAJalbarragupWAJarrahwoodWANannupWAScott River EastWAYoganupWA Postcode 6275 State or territory Western Australia (WA) Localities 10 Council area Nannup; Mainly Nannup, partly Donnybrook-Balingup; Busselton Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6271 · Postcode 6280