Why does getHostName return an IP address and not a hostname?

Question

Java

Why does getHostName return an IP address and not a hostname?

InetAddress inetAddress = InetAddress.getByName("93.186.225.193");
   System.out.println(inetAddress.getHostName());

Outputs: 93.186.225.193
And should: vk.com

Answer 1

There is no PTR record defined for this address, so reverse DNS lookup is not possible.