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.

7 hosts · 267 ms

HostCertsFirst seenLast seenDNS
jyskebank.de 12 2026-04-25 2026-10-01 ok
*.jyskebank.de 12 2026-04-25 2026-10-01 —
bankportal.jyskebank.de 1 2026-02-10 2026-02-10 ok
bun-bankverlag-p.jyskebank.de 1 2025-10-07 2025-10-07 nodata
sip.jyskebank.de 1 2026-02-02 2026-02-02 ok
lyncdiscover.jyskebank.de 1 2026-02-03 2026-02-03 ok
bun-bankverlag-s.jyskebank.de 1 2025-10-07 2025-10-07 nodata

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