Hii

First of all congratulations for your result you have a very decent score. Although the cutoffs for 2019 are yet to be out but as per the previou year cutoffs you have a chances of getting into IITs. Here is the last year cutoff scores of top IITs for ECE branch -

• IIT Bombay - 510 
• IIT Delhi - 770
• IIT Madras - 792
• IIT Kharagpur - 796
• IIT gwahatii - 662
• IIT Roorkee - 28.99
• IIT BHU - 618
• IIT Bhubaneshwar - 550

For NITs here is the last year cutoff - 

• NIT warangal - 739
• NIT trichy - 672
• NIT Surathkal - 697
• NIT Calicut - 714
• NIT Delhi - 745

For detailed cutoffs- you can refer to the following link - https://engineering.careers360.com/articles/gate-cutoff
You can also use our GATE college predictor tool which will help you predict the college you can expect to get admission in -https://engineering.careers360.com/gate-college-predictor

Hope this helps
Thanks!