Hello aspirant,
Congrats for getting good rank in JEE mains 2020. According to the last some years cut offs sorry to say but you have no any chances of getting admission into any good NIT unless you are from the North Eastern zone and wanted to take admissions there only because the cut offs for the lower in north-eastern NITs but there also you have very low chances.
You should go through the cut offs for NITs which will clear your all doubt regarding your chances of admission in the NITs. The link for NIT cut offs is provided below kindly go through that link.
https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches
With this rank you have good opportunities in some good private colleges so I would like to suggest you to with our college predictor tool which will help you in predicting your chances in various good colleges according to your rank, caste and preferences. The link for tool is given below.
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Best of luck.
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