Raghava, You haven't mentioned the State and Category you belong to. This is important because the cut offs are different for Home State Candidates and Other State Candidates. So please do help us with those details:

Your rank can be predicted by using the formula, (100-your total percentile)*869010/100. In your case, your approximate rank would be  93653. Let's say the number of candidates for April exam increased to 12,00,000 then your final rank shall be (100 - your total score) X 12,00,000/100.

So with this rank, it is difficult for NIT. You may have to appear for April session. Now to predict colleges, please use our college predictor:

Hello Raghava

You have low percentile in JEE MAINS 2020 and as you have mentioned that you belong to OBC category your expected should be 93,679 and with this rank there are less chances for you to get NIT for CS course .However you can wait for official cut off and if you want to know that which college you can get with this percentile,you can use college predictor tool to get the exact result of college you can get.

I hope This Helps

Best Of Luck!!!!