Hello Rahul
The NTA has not released the cutoff percentile and ranks range required for admission. And it may be released around 30th April 2019. Based on your percentile you can get admission in any government college/institute but not in NITs if you are a open category candidate. If you belong to a reserve category then there are nearly less chances of you to get a seat in NIT but not the top ones and top branches.
You can predict your college using the College predictor of Careers360 to know the college options for admission based on your percentile- go through the given link below:
https://engineering.careers360.com/jee-main-college-predictor

As per your marks, and considering you belong to General Category,  your probable rank will be approximately 62385 - 69885. At this rank you would not get any NITs but you can get into some good Government and Private colleges. You may predict your colleges at the link given below:-

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

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