Question

Is it necessary to have a localhost DNS Record?

I’m finally graduating from shared hosting, and (trying) to understand DNS records.

Is it necessary to have a A record with name " localhost " pointing to " 127.0.0.1 " ?

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No you don’t.

localhost is in your host file /etc/hosts not from any other domain server.

If you add a A record with localhost as name, it actually mean localhost.yourdomain.com not localhost.

Thank you. I was reviewing the DNS Zone Files in shared hosting and it was there (for years apparently), so it was confusing.