Hello Ajay,

Congrats on a good rank in JEE Mains. You have a good chance of getting into a good college with this rank but since you have not mentioned your category it is difficult to say for sure. Your chances depend on your category and the quota, like home state or All India quota, the branch you wish to choose etc. Under home state quota you will have good chances. Assuming that you are a general category candidate, you have good chance of  getting into  NITs, IIITs & GFTIs through JoSAA counselling.

You may go through the article below to know about previous year cut-off for various NITS,IIITs & GFTIs:

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

You may also use the college predictor tool to know your chances:

Hope this helps.

All the best