Hello Aspirant,
See it is quite difficult to tell you an exact figure of your OBC rank because it keeps on changing every year depending upon various factors but yes we can help you with approximate figures on the basis of analysis of previous year's data.
So If we go through the analysis of CRL rank Vs OBC rank for JEE-Main 2021 then according to the CRL rank mentioned by you in the question your EWS rank is expected to be in the range of 4000-6000 .
Note that the EWS rank which is predicted is only the expected rank on the basis of previous year's data so your actual EWS rank might vary depending upon current factors.
On such EWS rank you have chances in following NITs with ECE branch :-
To have a list of all those colleges which you can get based upon your JEE-Main rank or score you can use JEE-Main College Predictor:-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Or
You can also check out our Engineering Counselling Subscription package in which you get B.Tech companion tool which will guide you in all your counselling and admission related issues and along with this you will be getting 3 one-to-one counselling sessions by our experts :-
https://www.careers360.com/campaign/Engineering-Counseling-Subscription
I hope this information helps you.
Good Luck!!
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