Apple Monterey reserves port 5000, a common web development port

• pow

  3 3,444 10.0 CoffeeScript

  Discontinued Zero-configuration Rack server for Mac OS X

  

I don't think IANA explicitly reserved .dev. It was made popular as a local dev domain by Basecamp's Pow[1]. IANA only defines .test, .example, .invalid, .local, and .localhost as reserved (with .onion being the latest addition in 2015[2])

Though in this list, only .test and .example are marked as non-special and must be resolved normally by RFC 6761, and .local is reserved for mDNS by RFC 6762. In this list, .test would have been the most appropriate for Pow to use.

CydeWeys (Tech Lead of Google Registry) has commented on HN in the past that they did not anticipated people weren't following the best practices[3], which makes me think IANA should have given .dev the same treatment as .onion: by explicitly reserving them (but this is another topic to discuss).

[1]: https://github.com/basecamp/pow

[2]: https://www.rfc-editor.org/rfc/rfc7686.html

[3]: https://news.ycombinator.com/threads?id=CydeWeys

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

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