You have to little more about 600onwards to get an IIT dhanbad

As per your score and previous year cutoff, the colleges you get in first round are:-

IIT Bombay  Centre of Studies in Resources Engineering      Geoinformatics and Natural Resources Engineering 

IIT Kharagpur         Agricultural and Food Engineering         Food Processing Engineering

IIT Kharagpur         Agricultural and Food Engineering         Land and Water Resource Engineering   

IIT Bombay  Centre for Technology Alternative for Rural Areas       Technology and Development     

IIT Ropar      Center for Biomedical Engineering         Biomedical Engineering

IIT Kharagpur         Agricultural and Food Engineering         Agricultural Systems and Management

You can also use careers360 college predictor to know more about colleges you get as per your score.

https://engineering.careers360.com/gate-college-predictor