DNS & attack surface
No subdomain takeover risk
DNS hygiene, subdomains, takeover risks and domain registration.
Why it matters
An attacker can claim the abandoned resource and publish anything under your domain - convincing phishing pages, malware, or scripts that steal cookies of your main site.
How to fix it
Quick fix · under 1 hour- Delete the CNAME record immediately if the service is no longer used.
- Otherwise re-create the resource at the provider so the name is yours again.
- Review DNS whenever a hosted service is cancelled.
Test this now, free: Subdomain finder - no sign-up.
How we test it
The check runs from the public internet as part of every scan, read-only and without touching your data. If it fails, your report shows the evidence that proves it - the record, header, file or banner we observed - together with the fix above, tailored to the issue we found.
Does your domain pass this check?
Run all 97 checks in about a minute. Your first scan is free, with the complete fix for your most urgent finding.
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