Hi Aspirant!

According to previous year cutoff of IIST the closing rank under SC category of Aerospace Engineering is 139 and for Electronics and Commnuncation Engineering with specialisation in Avionics is 176 but your rank is above that hence it would be impossible for you to get the admission in IIST.

I hope it helps.

For more information you can follow up the below article by careers360:

https://engineering.careers360.com/articles/iist-btech-cutoff

Happy Hustling!