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 · 291 ms

HostCertsFirst seenLast seen
ls.uk 5 2026-05-14 2026-09-06
via.ls.uk 8 2026-06-13 2026-10-11
staff.ls.uk 4 2026-03-24 2026-08-19
careers.ls.uk 3 2026-02-20 2026-10-04
www.ls.uk 5 2026-05-19 2026-09-06
safety.ls.uk 4 2026-03-18 2026-08-13

Programmatic access: API GET /v1/hosts/ls.uk (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/ls.uk.