Tool for money

Hi guys! I have a great idea to make money but I am missing a step to achive it and I hope you could help me.

I need a way to find primary domains in the account of an specific hosting. For example, I would need to find several primary domains for hosting accounts in Godaddy.

I will share my business idea with the person who helps me acomplish this, GOOD MONEY to be made.

Thanks in advance!

Do a reverse IP check?