I got 9000 rank in JEE mains OBC category 2018. So please advice me the nit's in which i could be able to get admission

Branch Wise Opening and Closing Ranks of Top NITs under JEE Main

Above link shows you 2017 cut off ranks for various NITs branchwise

Nit Surat,Nit Kurukshetra,Nit Hamirpur ,Nit Durgapur,Nit Goa,Nit Jalandar and Nit Jamshedpur are some of the NITs where you have high chances for E.C.E,and NIT Warangal.

But you don't stick to my opinion you just talk to your parents,Teachers,Friends and the best talk to your SENIORS who are pursuing in those respective colleges.

It all depends on you and you should not get regreted on your decision later.