What it is _for-sale is a reserved DNS leaf node name, defined by RFC 10023 (Informational, July 2026) and registered with IANA. A TXT record published at _for-sale.example.com signals that example.com , although registered and resolving normally, is available for purchase. _for-sale IN TXT "v=FORSALE1;furi=https://example.com/for-sale" The record carries a mandatory version tag followed by at most one tag=value pair: Tag Meaning Example ftxt= Free human-readable text ftxt=Eligibility criteria apply. furi= Contact or information URI furi=mailto:[email protected] fval= Asking price, currency + amount fval=EUR2500.00 fcod= Proprietary code, by prior agreement fcod=XX-aHR0cHM... The wrong belief to clear first is that this is a way of parking a domain. It is close to the opposite. Parking replaces the site with a sales page, which costs you every visitor the domain still has.…