Home Postcodes by state NSW 2490 Postcode 2490 2490 is the postcode for 2 localities in NSW: North Tumbulgum and Tumbulgum. Localities with postcode 2490North TumbulgumNSWTumbulgumNSW Postcode 2490 State or territory New South Wales (NSW) Localities 2 Council area Tweed Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2489 · Postcode 2500