My question is How To Get Domain Name From Ip address Any ideas Will Be Accepted

I'm searching for that For 3 days no answer at all.

I want the program to work with unknown websites "I Create It Or The User Which he used It"

I give the IP address and the program will give me all the domain names For that server Like 216.58.211.100 >>>>> the result will bw >>>>>>www.google.com.

That it's so important to me right now. Why is it so difficult to do it? Any idea? I prefer VB.Net, but it's Ok with other languages or ideas. Thanks in advance.