"Adapaka" surname belongs to which caste Kalingi .
Explanation:
Kalingi is a caste that can be found in Andhra Pradesh and Odisha which are Indian states. This caste is found primarily in Srikakulam, Vizianagaram, Vishakapatnam and is also found in between the regions of Ganjam and Vizagapatam which are on the borderline.
This caste has a large population and can be easily identified because they wear Yagnopavita which are what they call sacred threads across their shoulders. They are found in the country north of Vamsadhara river, and in the Telugu parts of the country. They are not found south of the Chipurupalle .