It depends on your rank. Rank is made based on many factor and most important factor is number of candidates appeared. Rank list for general category and Reservation category is effected by many factors.
if you have rank below 1-2 lakh then you can get admission into low ranked NIT campus. for top NIT campus, you have to secure rank below 20k-30k.
so , if you want to study at NIT campus then try to get 75%-80% of the total score. give your best and practice well.
for previous year cutoff for different NIT campus, please visit the link below:-
Hope it helps!