Various resources with regard to RFC10023 1 - a lightweight method to add digital for sale signs to domain names.
🎉 Ready to sell your domain name? Why not put it up for sale with a digital For Sale sign ?
_for-sale.example.nl. 1800 IN TXT "v=FORSALE1;ftxt=Some human-readable info here."
_for-sale.example.nl. 1800 IN TXT "v=FORSALE1;furi=https://domain-sale.example.com/contact"
_for-sale.example.nl. 1800 IN TXT "v=FORSALE1;fval=USD1500"
Not sure yet? 🎓 Learn about the concept via the ForSale Expert (an 🧠 AI agent).
Important
🚨 Make sure to add the version tag v=FORSALE1; first, followed by a valid content tag (such as ftxt= or furi=) before entering the actual content value. Only then does it count as an official "for sale" sign that specialized tools will recognize.
ℹ️ More info here: https://rfc10023.nl/
👀 Check our one pager on http://forsaletxt.nl
Caution
The _for-sale method documented here predates forsaletxt.org. The latter is an unrelated proposal and should not be confused with the original _for-sale method.
ForSale is a standardized "_for-sale" DNS name for signaling that a domain name is available for purchase (or lease). The proposal addresses a common operational need by providing a machine-readable, globally consistent mechanism to indicate that domains are for sale, complementing inconsistent web-based parking pages and proprietary signaling methods.
- Machine-readable – systems can automatically detect which domains are for sale.
- Globally consistent – the same mechanism works across top-level domains worldwide.
- Supports automation – helps domain brokers, domain investors, and acquisition tools reliably discover domains for sale.
- Lightweight – uses the DNS, so no extra infrastructure or web scraping is needed.
A paradigm shift in domain discovery: registrars, marketplaces and others can automatically query for-sale records and surface available domains directly in buyer-facing search results.
- Individual domain owners - just put up the For Sale sign and increase your chances of being discovered as this method gains traction.
- Brokers - add the For Sale indicator to every domain name in your portfolio and increase visibility.
- Mediation services - your case is much stronger when the domain name is clearly marked with a For Sale sign.
- Domain name suggestion tools - look for a For Sale indicator for every domain name you generate, rather than only checking whether the domain name is already registered.
- Registries and registrars - work together to improve visibility, as SIDN did with the For Sale button in its WHOIS service.
- Online WHOIS/RDAP services - check for a For Sale sign and let your users know when a domain name is available for purchase.
- Coders - build tools that make it easy to generate syntactically correct records or discover existing ones, making life easier for non-technical users.
Tip
Check out the examples directory for more cool, advanced stuff!
An incomplete list:
- https://www.bortzmeyer.org/10023.html
- https://domainincite.com/31851-now-you-can-plant-for-sale-signs-directly-into-your-domains
- https://www.techtimes.com/articles/322752/20260803/dns-gets-first-standard-commercial-intent-rfc-10023-enables-sale-tags.htm
- https://webhosting.today/2026/08/03/a-dns-record-now-flags-domains-for-sale-adoption-is-up-to-registrars/
- https://seodisias.com/blog/rfc-10023-for-sale-dns/
- https://nameocean.net/article/rfc-10023-the-dns-record-that-could-revolutionize-domain-flipping/
- https://www.inwx.com/en/blog/for-sale-dns-record-explained
- https://catches.io/blog/dns-for-sale-records-verified-sale-paths
- https://tech-blog.chatujme.cz/clanek/rfc-10023-for-sale-dns
- https://ecosistemastartup.com/rfc-10023-2026-como-vender-dominios-sin-perder-trafico-con-dns/
- https://www.gtldti.com/blog/rfc-10023-the-new-ietf-standard-turning-dns-into-a-commercial-signals-layer
- https://elsolitario.org/2026/08/09/registro-dns-for-sale-rfc-10023/
- https://www.top10hebergeurs.com/guide/infos-industrie/un-enregistrement-dns-peut-desormais-signaler-un-domaine-mis-en-vente
- https://domainbrief.de/artikel/ein-rfc-bringt-das-verkaufsschild-ins-dns
- https://www.weaving.news/news/019fe1bc-618b-7d89-b450-ee0b328836f3
- https://dzen.ru/a/andRGVisDFMq7eug
- https://www.xela.au/saas/a-domain-can-now-say-it-is-for-sale-in-dns-7e6f90
- https://www.dyj.live/knowledge/story_id-gm_explore-rss_a883b083f3d8a86da5d9a206d1553052
- https://tldtab.com/nl/updates/rfc-10023-for-sale-dns
- https://news.hada.io/topic?id=32278
- https://fr.news.hada.io/topic?id=32278
- https://asibiont.com/blog/a-domain-can-pochemu-domen-teper-mozhet-soobshchit-o-prodazhe-cherez-dns
- https://419.consulting/encrypted-dns/f/dns-in-the-news-17th-august-2026
- https://okky.kr/spaces/it-news/1561969
- https://imasters.com.br/noticia/dominio-agora-pode-se-declarar-a-venda-direto-no-dns-via-rfc-10023
- https://news.linxi.com.au/news/new-dns-standard-allows-domain-owners-to-signal-sale-intent-without-disrupting-traffic
- https://circleid.com/posts/a-domain-is-registered-but-is-it-really-unavailable
- https://dotweekly.com/blog/list-domain-for-sale-dns-record
- https://www.captaindns.com/en/blog/dns-for-sale-txt-rfc-10023
- https://btw.media/en/dns-said-domain-for-sale-did-not-authorize-deal
- https://domaingang.com/domain-news/atom-makes-for-sale-domains-easier-for-domainer-tools-to-find/
- https://genztech.blog/p/rfc-10023-for-sale-dns-record/
- https://weberblog.net/is-a-registered-domain-really-unavailable/
- https://isthatdomainforsale.com/guides/what-is-rfc10023/
- https://siekman.io/blog/rfc-10023-domeinnaam-te-koop-via-dns/en
A few implementations and tools that already support RFC 10023:
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forsaledns.net — The first implementation, and still our recommended starting point.
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for-sale-dns.hx-std.com — Simple, lightweight, and does the job nicely.
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tldx — RFC 10023 support built right into the domain lookup tool.
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happyDomain — Supports RFC 10023 for identifying domains that are for sale.
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PWhois.net — Now with RFC 10023 support too.
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Inspect My DNS - Has a banner on top when a
_for-salelabel is found. -
IPAddress.to - IPAddress.to - cool toolset, now with support for RFC10023.
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RFC10023.de - Cool generator/validator, in German and English, with badge option:
.
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Dotweekly - Generator / checker.
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Domains Monitor - is monitoring this as well (full dataset).
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EasyDNScheck - Free DNS Checker.
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DomaintoolBelt - has a for-sale market filter.
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DomainKits MCP - has support in the API.
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RDAP.ai - a domain research tool for exploring availability, and viewing RDAP registration data.
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AdamProbolsky/SKILL - A provider-neutral skill for publishing a no-code domain for-sale signal using the RFC 10023 _for-sale DNS TXT record.
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SLD Checker - Provided by DNForum.com.
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DNSAudit.io - The Domain Security Auditor, who also posted a great blog about it.
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whoami.xj1.fr - 'domain lookup' informative tool.
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domain-check - Universal domain exploration engine.
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Domain Digger - Full Toolkit for Next-Level Domain Analysis.
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IsThatDomainForSale.com - Find out if a domain is for sale, check its DNS signals and preview its website.
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badge.forsale - Not entirely sure what this is, it feels a bit rough around the edges.
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Chromium Extension - Experimental, but fully functional Chrome browser extension.
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Namecheap-python - An RFC 10023 related commit.
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ZoekDomeinen.nl - In Dutch and .nl domeins only.
- NameGarage - Namegarage.
- Atom - (Formerly Squadhelp), a full-service domain registrar and premium marketplace.
Please note that there are quite a few more, such as NameShift, DomainMarket.com, Zycon Domains, PremiumDoms.io and EliteDomains, but they support it silently, so we don't include links to them on this page.
