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.

3 hosts · 256 ms

HostCertsFirst seenLast seenDNS
terrace.ch 5 2026-04-17 2026-08-20 ok
yawave.terrace.ch 5 2026-05-01 2026-08-30 ok
www.terrace.ch 5 2026-04-15 2026-08-15 ok

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