With a score of 618, your rank might be approximately between 4074-5630 . This is an expected rank range: https://medicine.careers360.com/articles/neet-result-marks-vs-rank . Now regarding the Colleges that you may have a shot at, you have a chance in:

• SVMC, TIrupathi
• GGSMC, Faridkot
• Tirunelveli Medical College

Having said that, this is based on 2019 data and cut offs change every year. Cut offs change every year depending on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. This is the first time that AIIMS is conducting its admission through NEET and so we cannot be certain. But yes, with this score, you might get a seat in AIIMS in States like Telangana, AP, etc. For a complete list of colleges that you may have a shot at, please use our College predictor: https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer