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 · 229 ms

HostCertsFirst seenLast seenDNS
gefaehrtenschmiede.com 4 2026-04-12 2026-08-14 ok
automationen.gefaehrtenschmiede.com 4 2026-04-19 2026-08-15 ok
webinar.gefaehrtenschmiede.com 3 2026-06-09 2026-08-30 ok
mta-sts.gefaehrtenschmiede.com 5 2026-05-13 2026-09-11 ok
www.gefaehrtenschmiede.com 4 2026-04-12 2026-08-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gefaehrtenschmiede.com (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/gefaehrtenschmiede.com.