Can I get a decent NIT or IIIT colleges on the basis of my EWS rank which is 4988?

Please visit this link. This is a college predictor by Shiksha and I hope this will help you to choose the right college- https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwie-7mvrITiAhWz73MBHYuID8oQFjAAegQIAxAB&usg=AO

Hello Aditya, You may use the college predictor tool from the link below to know your chances of getting NITs and IIITs based on your JEE Mains scores : https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.