Dear Aspirant,

With the marks above 250 you are definitely getting a rank under 10000. And under this rank you will get a very good NIT . So don't worry . You will definitely get a very good NIT.

1. The most important thing is, besides getting above 250 in JEE Mains you must have secured above 75% in 12th Board exams because it is the eligibility criteria of NIT's .
2. So with a percentage greater than 75% and marks above 250 in JEE Mains you are getting top NIT's.

For checking which colleges you are getting and all counselling , you can check it here>

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

Best of luck!