Admission in NITs is done on the basis of JEE Mains ranks and admission in IITs is done on the basis of JEE Advanced ranks. According to 2021 cutoffs, with this rank in JEE Advanced, you can get Mechanical engineering at IIT Dhanbad. You can also get Electrical engineering and Mechanical engineering at IIT Dharwad. Please note that this prediction is completely based on 2021 cutoffs. Also, take care of the fact that cutoffs can vary from year to year depending upon factors like number if seats available, number of students appearing for the examination, difficulty level of the paper etc.

You can get the top IITs with 500 rank in JEE Advanced :

1. IIT Bombay
2. IIT Delhi
3. IIT Kharagpur
4. IIT Kanpur
5. IIT Madras
6. IIT Roorkee

This is the list that is made by keeping in mind the placement statistics of these institutes. All of the above institutes are good. You can prioritize them according to your comfort by taking care of the  following criterion :

• Proximity from your home
• Fee structure
• Available branches in that institute
• Research opportunities available in the institute

Good luck for your future !