Home Postcodes by state QLD 4877 Postcode 4877 4877 is the postcode for 6 localities in QLD: Craiglie, Killaloe, Mowbray, Oak Beach, Port Douglas and Wangetti. Localities with postcode 4877CraiglieQLDKillaloeQLDMowbrayQLDOak BeachQLDPort DouglasQLDWangettiQLD Postcode 4877 State or territory Queensland (QLD) Localities 6 Council area Douglas Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4876 · Postcode 4878