If you last touched domain lookups a few years ago, the thing you remember is WHOIS: a plaintext protocol on port 43 that returned an unparseable wall of text in a different shape from every registry. It is effectively gone. RDAP replaced it, it is RFC 9083, it returns JSON, and every gTLD regi...
Source: [Dev.to](https://dev.to/glitchbound/whois-is-gone-rdap-replaced-it-and-a-404-does-not-mean-what-you-think-3alh)