The IETF recently published RFC 10023, which I authored. It defines a small DNS convention for signalling that a registered domain is currently for sale.

What has been particularly encouraging is the amount of traction and support it has already received so soon after publication. A number of tools and projects have already added support or are building around the idea, including:

- https://forsaledns.net/ — an early adopter and reference implementation.

- https://for-sale-dns.hx-std.com/ — a simple lookup tool and record generator.

- TLDX — a tool for quickly finding available domain names.

- happyDomain — centralised domain management.

- https://ipwhois.net/domain/example.nl — a domain and DNS lookup service.

- https://inspectmydns.com/ — another handy DNS inspection tool.

- https://ipaddress.to/lookup/example.nl — a collection of useful domain/IP tools, with API output that also helps detect syntax errors.

- https://www.rfc10023.de/en — a new tool aimed primarily at German-speaking users, with an English version already taking shape.

The basic idea is deliberately simple: a domain owner can publish a `_for-sale` TXT record:

_for-sale.example.com. 300 IN TXT "v=FORSALE1;furi=https://example.com/buy"

That's it - the domain has it's for sale sign.

Further info: https://rfc10023.nl/

Let me know what you think and please let me know if I’ve missed anything or if there are any updates to the list I keep!

Meta: How did you decide to author this RFC and what was it like bringing it through the process?