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.

6 hosts · 297 ms

HostCertsFirst seenLast seenDNS
gwriters.de 6 2026-05-09 2026-09-04 ok
*.gwriters.de 6 2026-05-09 2026-09-04 —
statamic-staging-static.gwriters.de 3 2026-06-04 2026-08-10 ok
statamic-staging.gwriters.de 3 2026-06-04 2026-08-11 ok
statamic-ch.gwriters.de 5 2026-05-25 2026-09-29 ok
mail.gwriters.de 1 2026-02-09 2026-02-09 ok

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