Area 9,425.01 km 2 (3,639 sq mi) [ 2 ] [ 3 ] • Telephone • +0824, 0825 • Vehicle • KA19, KA20, KA21, KL14 Tulu Nadu ( Tulu : ತುಳುನಾಡು), is the Tulu speaking region of Karnataka and Kerala , India . It consists of the Dakshina Kannada and Udupi districts and the