It appears that it has already been purchased as I tried earlier this morning to do the same. I do not know who currently owns it, as it has domain privacy enabled and is currently down.

On Fri, May 23, 2025 at 8:14 PM nobu (Nobuyoshi Nakada) via ruby-core <ruby-core@ml.ruby-lang.org> wrote:
Issue #21367 has been updated by nobu (Nobuyoshi Nakada).


It looks there are 95 links 22 unique URIs in www.ruby-lang.org.

```
http://ruby-doc.org
http://ruby-doc.org/core-1.8.7/String.html
http://ruby-doc.org/docs/ruby-doc-bundle/FAQ/FAQ.html
http://ruby-doc.org/stdlib-2.0.0/libdoc/dl/rdoc/DL.html
http://ruby-doc.org/stdlib-2.1.8/libdoc/dl/rdoc/DL.html
http://ruby-doc.org/stdlib-2.2.4/libdoc/dl/rdoc/DL.html
http://www.ruby-doc.org/core
http://www.ruby-doc.org/core-1.9.3/IO.html
http://www.ruby-doc.org/core-2.0/Enumerable.html
http://www.ruby-doc.org/core-2.0/Enumerator.html
http://www.ruby-doc.org/core-2.0/Module.html
http://www.ruby-doc.org/core-2.0/Range.html
http://www.ruby-doc.org/core/
http://www.ruby-doc.org/docs/ApprendreProgrammer/Apprendre_%E0_Programmer.pdf
http://www.ruby-doc.org/docs/ProgrammingRuby/
http://www.ruby-doc.org/stdlib
http://www.ruby-doc.org/stdlib/
http://www.ruby-doc.org/stdlib/libdoc/rdoc/rdoc/index.html
https://ruby-doc.org/
https://ruby-doc.org/core-2.4.0/Thread.html
https://www.ruby-doc.org/
https://www.ruby-doc.org/docs/ProgrammingRuby/
```

----------------------------------------
Misc #21367: Remove link to ruby-doc.org from www.ruby-lang.org/en/documentation/
https://bugs.ruby-lang.org/issues/21367#change-113412

* Author: p8 (Petrik de Heus)
* Status: Open
----------------------------------------
The ruby-doc.org domain no longer seems resolvable.
```
$ curl -I  http://ruby-doc.org
curl: (6) Could not resolve host: ruby-doc.org
```

The owner of the domain mentioned he wanted to sell it:
https://ruby.social/@jamesbritt@mastodon.social/114375521600278606

This is probably a good time to remove it from https://www.ruby-lang.org/en/documentation/.
This could also improve SEO for the official documentation.



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