Supposing you are a general category student , sorry i may sound harsh to you but you will not be able to get any NIT or IIIT at this rank but don’t loose hope , NIT or IIIT are not the end of life , their are many private colleges which gives admission on the basis of JEE mains score so you can try for them like

JAYPEE NOIDA 

UIET CHANDIGARH

UPES DEHRADUN

Galgotia University

or many state colleges.