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 · 312 ms

HostCertsFirst seenLast seenDNS
cloud.email.famousfootwear.com 2 2025-09-21 2026-09-08 ok
image.email.famousfootwear.com 3 2025-08-04 2026-07-13 ok
click.email.famousfootwear.com 3 2025-09-08 2026-08-26 ok
pages.email.famousfootwear.com 3 2025-09-08 2026-08-31 ok
view.email.famousfootwear.com 3 2025-09-08 2026-08-31 ok

Programmatic access, with DNS A records: API GET /v1/hosts/email.famousfootwear.com (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/email.famousfootwear.com.