Hi dear,

Hope you are doing well and congrats for getting such a good rank in mains.

As you will be knowing candidates who meet the cutoff of JEE Main 2019 for Top IIITs will have more chances of admissions into the institute and course of their preference.

Some IIITs in which you might get addmision are:

Indian Institute of Information Technology, Jhalwa, Allahabad, Uttar Pradesh

Indian Institute of Information Technology Lucknow

Indian Institute of Information Technology Sri City, Chittoor, Andhra Pradesh

Indian Institute of Information Technology Srirangam, Tiruchirappalli

Indian Institute of Information Technology, Kota, Rajasthan

Indian Institute of Information Technology (IIIT) Pune

Indian Institute of Information Technology, Vadodara, Gujarat

Indian Institute of Information Technology(IIIT) Kilohrad, Sonepat, Haryana

Indian Institute of Information Technology, Design & Manufacturing, Kancheepuram, Tamil Nadu

Indian Institute of Information Technology Lucknow

As I have already mentioned it depends upon which course  you will be choosing.

I would recommend you to go through previous years cutoffs once it will give you a better idea.

All the best!