Your son Predicted All India Rank is 1471

As per his score and previous year cutoff, the colleges he get are:-

NIT Patna

Visveraya NIT Nagpur

Maulana Azad NIT Bhopal

NIT Warangal

To know more about your chances of getting other colleges check out the college predictor link below:

https://engineering.careers360.com/jee-main-college-predictor 

To predict your rank check out this college predictor rank link below:

https://engineering.careers360.com/articles/jee-main-rank-predictor