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.

13 hosts · 624 ms

HostCertsFirst seenLast seenDNS
ricardo.ch 10 2026-05-16 2026-09-11 ok
*.ricardo.ch 10 2026-05-16 2026-09-11 —
*.internal.ricardo.ch 10 2026-05-16 2026-09-11 —
qykzunftnm.ricardo.ch 12 2026-04-13 2026-10-07 ok
o.ricardo.ch 5 2026-06-02 2026-09-30 ok
*.auto.ricardo.ch 10 2026-05-16 2026-09-11 —
*.fr.auto.ricardo.ch 10 2026-05-16 2026-09-11 —
help.ricardo.ch 5 2026-05-22 2026-09-19 ok
*.fr.ricardo.ch 10 2026-05-16 2026-09-11 —
www.locals.ricardo.ch 10 2026-05-16 2026-09-11 ok
status.ricardo.ch 10 2026-05-30 2026-09-27 ok
links.reply.ricardo.ch 10 2026-04-17 2026-08-13 ok
kafka-proxy.ricardo.ch 4 2026-04-11 2026-08-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ricardo.ch (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/ricardo.ch.