I want a good engineering college. I have scored 127 in JEE. What to do?

Dear, Submit your marks are not much good, you will get some average NIT. Please visit the college predictor to get perfect college for you. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

As you know competition is very high it's very much unpredictable to tell which college you may get. You can check last year's results and you can also check on predictor apps as they will help you to get a rough idea of it.