Home Postcodes by state NSW 2107 Postcode 2107 2107 is the postcode for 5 localities in NSW: Avalon, Avalon Beach, Bilgola, Clareville and Whale Beach. Localities with postcode 2107AvalonNSWAvalon BeachNSWBilgolaNSWClarevilleNSWWhale BeachNSW Postcode 2107 State or territory New South Wales (NSW) Localities 5 Council area Northern Beaches Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2106 · Postcode 2108