which nit/iiit/gfti I'll get at 20000ews rank and 129000 crl rank
Hello Aspirant,
According to the category rank you have mentioned in the question you cannot get any of the top NITs as per previous year's cut-offs but yes you can get some of the lower NITs like NIT Goa, NIT Meghalaya, NIT Puducherry if you deserves Home state quota for them but if not then I would suggest you to sit for some state counselling because in some of the state government colleges you can get admission on such ranks.
Note that the cut-offs are bound to change every year depending upon various factors.
So you can use JEE-Main College Predictor to predict your chances of admission in different engineering colleges of India :-
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
I hope this information helps you.
Good Luck!!