Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

7 hosts · 310 ms

HostCertsFirst seenLast seenDNS
marksandspencer.fr 2 2025-09-30 2026-08-12 nodata
image.newsletter.marksandspencer.fr 2 2025-09-09 2026-09-27 ok
pages.newsletter.marksandspencer.fr 4 2026-04-06 2026-09-28 ok
autodiscover.marksandspencer.fr 3 2025-10-13 2026-09-16 ok
smetrics.marksandspencer.fr 2 2025-10-13 2025-10-13 ok
www.test.marksandspencer.fr 2 2025-09-30 2026-08-12 nodata
www.marksandspencer.fr 3 2025-09-30 2026-08-12 ok

Programmatic access, with DNS A records: API GET /v1/hosts/marksandspencer.fr (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/marksandspencer.fr.