How to use this tool
Choose a starting URL, static crawl depth, and page limit. Hostnames found in href, src, action, and data-src attributes are classified as first- or third-party and resolved to addresses or CNAME targets.
Result transparency
Every report identifies completed data sources, unavailable providers, individual findings, coverage, and detailed evidence. Unavailable checks are excluded from scoring rather than treated as passing.
Frequently Asked Questions
What does the Website Hostname Mapper check?
Crawl a limited static website sample and map first-party and third-party resource hostnames to DNS endpoints.
What should I enter in the
Enter the domain or hostname requested by the form without unrelated text, paths, or multiple values.
Are the results live?
The result reflects the data and network response available when the check runs. DNS, HTTP, and certificate information can change later.
What does an unavailable result mean?
An unavailable result means the requested source could not be reached or did not return usable data. It is not automatically a pass or a failure.
Should I rely on this result alone before making changes?
Use the report as a diagnostic reference and confirm important changes with the authoritative provider, hosting panel, or certificate issuer.