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.

4 hosts · 286 ms

HostCertsFirst seenLast seenDNS
winsearch.fr 11 2026-04-30 2026-09-30 ok
staging.winsearch.fr 6 2026-05-21 2026-09-07 ok
www.staging.winsearch.fr 6 2026-05-21 2026-09-07 nodata
www.winsearch.fr 11 2026-04-30 2026-09-30 ok

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