There are total 23 IIIT in India. They are in Gwalior, Kanchipuram(Tamil Nadu), Kottayam, Allahabad, Jabalpur, Guwahati, Kota, Chittoor, Vadodara, Una(Himachal Pradesh), Kalyani, Sonepat, Lucknow, Sri City, Nagpur, Bhopal, Bhagalpur, Tiruchirapalli, Imphal, Dharwad, Ranchi, Kurnool, Pune, and Surat. For any other information click the link given below.

https://engineering.careers360.com/articles/list-of-indian-institutes-of-information-technology-iiits