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.

6 hosts · 261 ms

HostCertsFirst seenLast seenDNS
matisse-dentaire.fr 3 2026-04-07 2026-10-06 ok
*.matisse-dentaire.fr 3 2026-04-07 2026-10-06 —
staging.matisse-dentaire.fr 5 2026-04-26 2026-08-24 ok
element.matisse-dentaire.fr 4 2026-04-12 2026-08-16 ok
www.matisse-dentaire.fr 5 2026-05-13 2026-09-10 ok
matrix.matisse-dentaire.fr 4 2026-04-12 2026-08-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/matisse-dentaire.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/matisse-dentaire.fr.