How the domain checker works
Understand the evidence behind a domain sale result.
Start with a domain
Enter a domain or its website URL. We normalize the hostname and check that exact name, including any subdomain. We do not assume example.co.uk means co.uk, or silently change www.example.com to example.com. If you want the parent domain, run a separate check.
Read the published evidence
We query TXT records at _for-sale followed by your domain. A FORSALE1 marker expresses sale intent under RFC 10023. Prices and contact details come from the publisher; we do not verify the seller’s identity or authority. The validator shows malformed content separately from sale intent.
Inspect the website independently
Website inspection runs separately so a slow or broken homepage does not prevent a DNS result. We check public addresses, HTTPS, redirects, status, title and description. A known marketplace destination is only a possible sale signal. No keyword alone is treated as proof. Homepage screenshots are retrieved separately through a managed screenshot provider and may be cached for 24 hours. Some sites block capture or show an access restriction.
Understand the result
For sale means an explicit DNS marker was found. Possibly for sale means a recognizable marketplace destination was found. No sale signal found means our supported checks found no evidence. Unable to verify means DNS failed. None of these results is a registration availability check.
Check freshness
DNS results are cached for no longer than their returned TTL, capped at five minutes. Website metadata is cached separately for five minutes. Errors have shorter retention. Use Refresh check for a new DNS query, subject to rate limits.