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.

12 hosts · 283 ms

HostCertsFirst seenLast seenDNS
friedwald.de 6 2025-08-07 2026-07-06 ok
*.friedwald.de 4 2026-07-05 2026-07-05 —
stage.friedwald.de 5 2026-05-23 2026-09-27 ok
karriere.friedwald.de 4 2026-05-11 2026-09-28 ok
mein.friedwald.de 5 2026-05-21 2026-09-25 ok
immersion.friedwald.de 5 2026-06-01 2026-09-29 ok
newsletter.friedwald.de 5 2026-04-24 2026-09-23 ok
newserver.friedwald.de 5 2026-05-20 2026-09-25 ok
jobs.friedwald.de 5 2026-05-24 2026-09-29 ok
dynamics-test.friedwald.de 5 2026-05-06 2026-09-10 ok
forst.friedwald.de 3 2026-06-07 2026-08-13 ok
www.friedwald.de 2 2025-08-07 2026-07-06 ok

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