Finding Information about Domain Names

When we make a request to facebook.com, our computer looks up the domain name to translate that domain name into an IP address so the computer can make that connection. An IP address points to a computer on the internet, but a domain name is easier to remember than a group of numbers. Domain Name System (DNS) servers store the mappings of IP addresses, along with other information. There are several command-line tools we can use to query these servers.

The dig command

We can use the dig command to dig through domain name records and find the IP addresses associated with those. It’s a reliable way to get information about a domain:

dig facebook.com