Hello aspirant

hope you are doing well and safe. With reference to your query,  I would glad inform you that at your rank you holds very low chances of getting admission in government colleges like nits and iits in core branches . I would advise you to start preparing for next attempt or look for private universities.

you can use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India :-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope you found this answer informative. Best wishes for your future