Hello Aspirant, hope you are doing good.

Congratulations for your rank , I'm sure you gave your best. Now, coming to your question, it's not really possible for you to get into NITs or GFTIs, belonging to general category( I'm assuming you are from general category because you haven't specified any category). Usually, to get into NITs or GFTIs from general category, you have to have a rank between 10k, so i don't think you have much chances.

You can get the details here:

https://engineering.careers360.com/articles/jee-main-cutoff

If you want to know about all the possible colleges you can get into, you can use our college predictor tool :

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good Luck!