Hello Aspirant,
Hope You are doing well!
Sorry dear,a general rank 56000 is really high for getting into top NITs,as the cut-off'a for NIT's are high in Jee- mains,you may go for lower ranked NIT's but you won't get a good branch,so its better to try for some other colleges as many colleges have better rankings than the lower NIT's.
For More reference you may have a look at the previous year cutoffs:
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits
Also,To find all the possible colleges under your Jee- Mains rank you may go on the college Predictor below:
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Hope this was helpful!
All the best!
Keep Smiling :)
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile