good morning akash!!
i am very sorry to inform you that with 15000 rank in SC CATEGORY, you wont be able to get any NIT.

However the trends and cutoffs are for previous years.Lets hope that some good happens To us.

I m providing you a link for  knowing colleges in which you can get a seat for your rank and percentile and category,please see the following link :

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

All the best

Thank you