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.

13 hosts · 308 ms

HostCertsFirst seenLast seen
lifetime.com 1 2025-11-17 2025-11-17
*.lifetime.com 1 2025-11-17 2025-11-17
micollab.lifetime.com 5 2026-04-23 2026-09-24
prototypemic.lifetime.com 2 2026-05-24 2026-05-24
remote.lifetime.com 2 2026-02-01 2026-06-29
km.lifetime.com 2 2025-07-14 2026-05-14
www.km.lifetime.com 2 2025-07-14 2026-05-14
ump.lifetime.com 3 2025-07-23 2026-07-23
www.ump.lifetime.com 3 2025-07-23 2026-07-23
gump.lifetime.com 3 2025-07-05 2026-07-05
www.gump.lifetime.com 3 2025-07-05 2026-07-05
ftp.lifetime.com 1 2025-10-28 2025-10-28
www.ftp.lifetime.com 1 2025-10-28 2025-10-28

Programmatic access: API GET /v1/hosts/lifetime.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/lifetime.com.