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.

5 hosts · 258 ms

HostCertsFirst seenLast seenDNS
dpd.lu 2 2026-06-02 2026-06-06 ok
*.dpd.lu 1 2026-06-02 2026-06-02 —
subscribe.dpd.lu 9 2026-04-17 2026-09-14 ok
fm.dpd.lu 4 2026-04-09 2026-09-08 ok
www.dpd.lu 1 2026-06-06 2026-06-06 ok

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