Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

4 hosts · 232 ms

HostCertsFirst seenLast seen
cloud.em.homeserve.com 2 2026-02-19 2026-02-19
image.em.homeserve.com 5 2026-01-28 2026-09-23
click.em.homeserve.com 2 2026-02-19 2026-02-19
view.em.homeserve.com 2 2026-02-19 2026-02-19

Programmatic access: API GET /v1/hosts/em.homeserve.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/em.homeserve.com.