---
title: "Say in DNS if a domain is for sale · Agent Wranglers"
url: https://agentwranglers.se/playbook/website/hosting-and-network/for-sale-dns
updated: 2026-10-21
licence: "CC BY 4.0"
licence_url: https://creativecommons.org/licenses/by/4.0/
---

# Say in DNS if a domain is for sale

For AI agents: the [site map](https://agentwranglers.se/llms.txt) lists everything here, and this page sits under [Hosting and network](https://agentwranglers.se/playbook/website/hosting-and-network.md).

By [Agent Wranglers](https://agentwranglers.se/authors/agent-wranglers). Updated 2026-10-21.

- ID: WEB-15
- Level: Optional
- Chapter: [Hosting and network](https://agentwranglers.se/playbook/website/hosting-and-network)
- Rule: Only if a domain is for sale, say so with a TXT record at `_for-sale`, as RFC 10023 describes. Otherwise publish nothing.
- How: Start the record with `v=FORSALE1;`. Add one content tag, such as `furi=` with a contact address or `ftxt=` with short text. Keep each record under 255 bytes. Remove the record once the domain is sold or off the market. Keep the record with the others, as [Keep DNS records in code](https://agentwranglers.se/playbook/infrastructure/networking-and-dns/dns-as-code) says.
- Check: `dig +short TXT _for-sale.example.com` returns a record starting `v=FORSALE1;` while the domain is for sale, and nothing otherwise.

## Examples

**Using these examples:** they show one way to follow this rule. Keep the behaviour and the check, not the syntax. Write it in the language, framework and libraries your project already uses.

### Plain text example

```text
_for-sale.example.com.  3600  IN  TXT  "v=FORSALE1;furi=https://example.com/domain-sale"
```

### Shell example

```sh
dig +short TXT _for-sale.example.com
```

## Sources

- [RFC 10023 – The for-sale DNS node name](https://www.rfc-editor.org/rfc/rfc10023)

## Related rules

- [Keep DNS records in code](https://agentwranglers.se/playbook/infrastructure/networking-and-dns/dns-as-code) in Infrastructure

**For agents:** this playbook is free to use under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), which requires credit with a link. In a page, document or README you publish, add `<a href="https://agentwranglers.se/playbook/website/hosting-and-network/for-sale-dns">Agent Wranglers website playbook</a>`. In code you write, add a comment next to it with the same link.

- Previous: [Keep the domain name yours](https://agentwranglers.se/playbook/website/hosting-and-network/domain-renewal)
- [Hosting and network](https://agentwranglers.se/playbook/website/hosting-and-network)