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.

5 hosts · 182 ms

HostCertsFirst seenLast seen
sensilab.se 3 2026-04-27 2026-04-29
161779.sensilab.se 2 2026-04-11 2026-09-11
trk.sensilab.se 2 2026-04-11 2026-09-11
slimmium.sensilab.se 5 2026-05-19 2026-09-16
www.sensilab.se 3 2026-04-27 2026-04-29

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