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.

6 hosts · 251 ms

HostCertsFirst seenLast seen
sensilab.at 3 2026-04-27 2026-04-29
161779.sensilab.at 2 2026-04-11 2026-09-11
trk.sensilab.at 2 2026-04-11 2026-09-11
slimmium.sensilab.at 5 2026-05-25 2026-09-22
www.sensilab.at 3 2026-04-27 2026-04-29
slimjoy.sensilab.at 5 2026-05-05 2026-09-03

Programmatic access: API GET /v1/hosts/sensilab.at (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/sensilab.at.