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 · 259 ms

HostCertsFirst seenLast seenDNS
yves-rocher.ca 2 2026-06-03 2026-06-03 ok
cloud.news.yves-rocher.ca 2 2025-09-16 2026-09-03 ok
image.news.yves-rocher.ca 3 2025-07-30 2026-08-19 ok
click.news.yves-rocher.ca 2 2025-09-30 2026-09-17 ok
view.news.yves-rocher.ca 2 2025-09-16 2026-09-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/yves-rocher.ca (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/yves-rocher.ca.