The Domain Name System (DNS) is used to resolve human-readable hostnames like WHOISPING.COM into machine-readable IP addresses like 220.127.116.11. DNS also provides other information about domain names, Like mail services mail services. But why is DNS important? How does it work? What else should you know? Why is DNS important? DNS is just like a phone book for the Internet world. If you know a person’s name but don’t know their telephone number, you can simply look it up in a phone book. DNS provides this same service to the Internet. When you visit WHOISPING.COM in a browser, your computer uses DNS to retrieve the website’s IP address of 18.104.22.168. Without DNS, you would not only be able to visit our website (or any website) by visiting its IP address directly, such as http://22.214.171.124 How does DNS work? What is DNS? - DNS Flow Chart When you visit a domain such as WHOISPING.COM, your computer follows a series of steps to turn the human-readable web address into a machine-readable IP address. This happens every time you use a domain name, whether you are viewing websites, sending email.