Igot 93.8 18,900 rank in OBC category will I get seat in any clg in nit or Iiit

Hii.Tour percentile is good.
As per the previous year cutoffs you have a tough chance of getting medium ranked NITs such as NIT Nagpur, NIT Raipur, NIT Rourkela,etc ,even if you get it in later rounds you might have to compromise with the branch.
If you are Interested in CSE or ECE you can get lower ranked NITs such as NIT Patna, NIT Hamirpur, nit Durgapur ,NITs from North-east.

You can also check for Colleges on the link below
https://engineering.careers360.com/jee-main-college-predictor