hello venkanna!!
with 515 marks in neet 2019,and from andhra pradesh you would be getting mbbs seat in AU REGION :

Rajiv Institute of Dental Sciences, Kadapa 

Dr Pinnamaneni Siddhartha Institute of Medical Sciences, Chinoutpalli

Katuri Medical College and Hospital, Guntur

Maharajaha Institute of Medical Sciences, Nellimarla

Konaseema Institute of Medical Sciences and Research Foundation, Amalapuram.

However these are based on previous years trends and analysis..

Also you can use our college predictor for getting more accurate predictions :

Https://medicine.careers360.com/neet-college-predictor?icn=NEET_clgpd&ici=NEET_text-mapping

All the very best

Thank you