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.

10 hosts · 233 ms

HostCertsFirst seenLast seen
lise.com 3 2026-04-01 2026-09-23
doc.lise.com 1 2026-07-28 2026-07-28
ephemeral.lise.com 3 2025-06-13 2025-06-17
production.lise.com 5 2025-11-25 2026-03-31
develop.lise.com 37 2025-06-18 2026-01-05
stgroup.lise.com 5 2026-05-20 2026-09-13
www.stgroup.lise.com 5 2026-04-11 2026-10-08
docs.lise.com 5 2026-07-28 2026-09-25
www.lise.com 3 2026-04-01 2026-09-23
sandbox.lise.com 2 2026-01-18 2026-01-23

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