Dear student it's difficult to tell you exactly but their is chance for following,
Nit mizoram
Nit manipur
Nit nagaland
Nit arunachal pradesh
You could get the following iiit's at this rank
Iiit bhopal
Iiit una
Iiit dharwad
Iiit kalyani
Iiit kottayam
Iiit sri city
Iiit kurnool
Iiit ranchi
Iiit vadodara
Iiit agartala
Iiit nagpur
You can get these nit's and iiit's till the csab round.
If you could tell us to compare two or three of them, we would surely help you with that. Comparing all of them would be practically impossible.

Hi aspirant, since you have 21668 rank in your JEE mains exam so according to that below are the NIT's and IIIT and other government institutes in which you can enroll yourself for admission;

• National Institute of Technology, Srinagar
• National Institute of Technology, Rourkela
• Sardar Vallabhbhai National Institute of Technology (https://w, Surat
• National Institute of Technology, Agartala
• National Institute of Foundry and Forge Technology, Ranchi
• Netaji Subhas University of Technology, Delhi
• Delhi Technological University, Delhi
• Indraprastha Institute of Information Technology, Delhi
• National Institute of Electronics and Information Technology, Aurangabad
• Assam University, Silchar
• GKV - Gurukula Kangri Vishwavidyalaya, Haridwar

Etc.

For more college visit the below mentioned link;

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

Thank You.