Hii

Congratulations first of all. You have a good score to secure a seat for yourself at top NITs or IITs. But it is suggested before coming to any cncluson that we wait for all the college to announce their cutoffs. The cutoffs vary every year depending on many factors. It can go higher than the previous year or even lower.
As per previous year cutoff you have a chance for following colleges -
IIT Guwahati - 600
IIT Bombay -750
IIT Kanpur - 732
IIT Hyderabad - 728
IIT Patna - 48.96/100
IIT Roorkee - 57.23/100
NIT calicut - 750
NIT durgapur - 698
MNIT Jaipur - 703
NIT Bhopal - 747

You can use the college predictor through GATE, tool which will help you predict the expected college. But remember there can be some variation as the college predictor works on the basis of previous year informations.
Here is the link - https://engineering.careers360.com/gate-college-predictor

Hope this helps
Thanks!!