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 · 569 ms

HostCertsFirst seenLast seenDNS
shapingnewtomorrow.de 13 2026-05-16 2026-09-25 ok
cookie.shapingnewtomorrow.de 2 2025-07-16 2026-06-15 ok
ssgtm.shapingnewtomorrow.de 3 2026-05-29 2026-09-12 ok
returns.shapingnewtomorrow.de 9 2025-09-19 2026-09-11 ok
www.returns.shapingnewtomorrow.de 1 2025-09-19 2025-09-19 nxdomain
dot.shapingnewtomorrow.de 3 2026-06-06 2026-08-05 ok
www.shapingnewtomorrow.de 13 2026-05-16 2026-09-27 ok

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