Hi Jaswanth

I will recommend you to check the cutoff of all the NITs as it is the cutoff that will let you know your admission chances. The minimum marks required to get admission in any institution or course is known as cutoff and it varies from institute to institute, course to course and category to category. 

Suppose you have rank less than the cutoff rank, then your chances of admission will lower down.

Follow the link given below to check the cutoff of NITs:

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

I will also suggest you to use the JEE Main college predictor. It is a tool created by Careers360 to help candidates know the colleges and courses available to them on the basis of their ranks. Please note that the tool is indicative in nature. Try and use it from the link given below.

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

Hope this helps! 

All the best !