Hello Nandini, 

With OBC rank 55,769 you cannot get into IIIT Kanchipuram. Your rank is too high to be considered for intake in any branch. The usual closing rank for round 6/7 goes around 15-18k and 55k is very far from that. You can however look for more colleges based on your JEE mains performance by using the JEE main college predictor tool:

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

All the best