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DNS

Domain Name System

"The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private network."

Query system resolvers

MacOS

dscacheutil -q host -a name github.com

Tips

  • If you need a public address that resovles to localhost, you can use localtest.me
  • If you need a globally resolvable hostname that point to any arbitrary ip address, use nip.io