Home Postcodes by state NSW 2869 Postcode 2869 2869 is the postcode for 3 localities in NSW: Peak Hill, Tomingley and Trewilga. Localities with postcode 2869Peak HillNSWTomingleyNSWTrewilgaNSW Postcode 2869 State or territory New South Wales (NSW) Localities 3 Council area Parkes; Narromine Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2868 · Postcode 2870