You've probably registered a domain with Route53 or another popular registrar.

You pick something like seanboult.dev, spin up a web server, configure your A record, attach a TLS cert, and boom it's live.

Well in the past, before the AI boom, there once was a web server on .ai and it made its way to Hacker News.

This was a cool relic that always intrigued me. Here is a snapshot from the Wayback Machine.

Well now you're like wait, I can't go to http://ai today? No, sadly at some point the A record was removed and the web server was shut down.