Hi Aspirant!

According to previous year last round(Round 7) cutoffs the closing rank for SC candidate under the other state quota is under 12k but your rank is so far from that range hence it would be impossible for you to get the admission in any NIT,IIIT or GFTI.If we consider your preparatory rank it will also not help you to get the admission in IIT because only 30-40 students got the admission in preparatory course and your rank is 1580 which is a big difference.

Preparatory course information:

https://engineering.careers360.com/news/iits-announce-preparatory-course-for-scst-candidates

You can follow these Career360's articles for a better understanding of cutoffs.

NIT: https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches

IIIT: https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits

GFTI: https://engineering.careers360.com/articles/jee-main-cutoff-for-top-gftis

Also, you can follow up this Career360's article for more information on CSAB SPECIAL COUNSELLING:

https://engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis

Also don't forget to check out the Career360 College Predictor to know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc. https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

HAPPY HUSTLING!