In reverse DNS (Domain Name System), you input the Internet protocol address of a website, and the domain name of the website is returned to you. In a normal DNS look-up, a domain name is matched to an IP address. The reverse DNS look-up process is useful for finding out the domain name of Web servers when you only have an IP address.
Instructions
Difficulty:
Step 1
Open the command prompt window on your computer by clicking "Start," "All Programs," "Accessories" and "Command Prompt."
Step 2
Type "ping -a 123.456.123.456" into the command prompt window, replacing "123.456.123.456" with the IP address of the server you are performing a reverse DNS look-up on.
Step 3
Press "Enter" and look at the return text in the command prompt window, which contains the domain name that resolves to the IP address you looked up.