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.

6 hosts · 228 ms

HostCertsFirst seenLast seenDNS
jyskerealkredit.dk 8 2026-04-17 2026-08-13 ok
inkasso.jyskerealkredit.dk 10 2026-04-18 2026-08-14 ok
sip.jyskerealkredit.dk 1 2026-02-02 2026-02-02 ok
lyncdiscover.jyskerealkredit.dk 1 2026-02-03 2026-02-03 ok
ir.jyskerealkredit.dk 3 2026-06-12 2026-08-21 ok
www.jyskerealkredit.dk 10 2026-04-19 2026-08-16 ok

Programmatic access, with DNS A records: API GET /v1/hosts/jyskerealkredit.dk (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/jyskerealkredit.dk.