Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

10 hosts · 263 ms

HostCertsFirst seenLast seenDNS
swissquote.lu 2 2026-03-27 2026-04-14 ok
*.swissquote.lu 2 2026-03-27 2026-04-14 —
bank.swissquote.lu 1 2026-04-14 2026-04-14 nxdomain
*.bank.swissquote.lu 1 2026-04-14 2026-04-14 —
k8s.swissquote.lu 1 2025-09-29 2025-09-29 nxdomain
*.k8s.swissquote.lu 1 2025-09-29 2025-09-29 —
dev.k8s.swissquote.lu 2 2025-07-15 2026-07-31 nxdomain
*.dev.k8s.swissquote.lu 2 2025-07-15 2026-07-31 —
ebooks.swissquote.lu 1 2025-12-11 2025-12-11 ok
reports.swissquote.lu 1 2026-01-07 2026-01-07 ok

Programmatic access, with DNS A records: API GET /v1/hosts/swissquote.lu (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/swissquote.lu.