Hello!
Here's a list of NITs and their opening and closing ranks for previous years, along with category specification:

Https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

These are for all the branches, so you can even have a look in accordance to your branch of choice! EWS happens to be newly introduced and does not have any past closing and opening ranks, but hope this helps.

Good luck!