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.

5 hosts · 287 ms

HostCertsFirst seenLast seenDNS
tf1info.fr 2 2026-04-16 2026-06-09 ok
*.tf1info.fr 2 2026-04-16 2026-06-09 —
l.tf1info.fr 9 2026-05-24 2026-09-19 ok
qr.tf1info.fr 3 2026-05-22 2026-08-10 ok
sosvillages.tf1info.fr 5 2026-05-12 2026-09-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/tf1info.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/tf1info.fr.