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 · 334 ms

HostCertsFirst seenLast seenDNS
jyskebank.com 18 2026-04-28 2026-09-10 ok
*.jyskebank.com 12 2026-05-15 2026-09-10 —
alpha.jyskebank.com 5 2026-07-30 2026-09-27 ok
jb.jyskebank.com 3 2026-06-12 2026-08-21 ok
sip.jyskebank.com 1 2026-02-02 2026-02-02 ok
lyncdiscover.jyskebank.com 1 2026-02-03 2026-02-03 ok
ir.jyskebank.com 3 2026-06-12 2026-08-21 ok
investor.jyskebank.com 8 2026-04-28 2026-08-24 ok
preview.jyskebank.com 5 2026-07-30 2026-09-27 ok
www.jyskebank.com 8 2026-04-28 2026-08-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/jyskebank.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/jyskebank.com.