Sorry to say but you didn't scored enough to get seat in NIT as the cut offs for NITs for any branch is very high as compared to other colleges If we have a look on previous year cut off in general you need to score below 50k to get into NITs and below 20k to get into top NITs with you desired branch however with your obc rank you might be able to get a college but definately not any NIT or IIIT but there are many colleges who have jee main reservations in them and some percent of seats are reserved for the students who're taking admission through mains so there's still some hope left for you. Though the cut offs aren't announced yet so need to wait for that but till than you can see what colleges you might get with this rank with the help of our jee main college predictor you just need to enter your rank your category,your home state and your desired branches and you're good to go and you can even have a look on previous year cut offs of NITs and other colleges. I am providing you the link for all. But  i would suggest you to look for some backup options as there are many engineering enterence exams nowdays if you have given them then all right and if not then you should go for some good private colleges like Gagotias, manipal,SRM,MMM and so on and side by side you can go for the counceliing of jee mains too and try your luck.

https://engineering.careers360.com/jee-main-college-predictor

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

https://engineering.careers360.com/articles/jee-main-cutoff