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 · 300 ms

HostCertsFirst seenLast seenDNS
jolifin.de 17 2026-04-27 2026-09-11 ok
*.jolifin.de 12 2026-05-09 2026-09-11 —
capid.jolifin.de 8 2026-04-21 2026-08-18 ok
assets.jolifin.de 1 2026-09-02 2026-09-02 ok
load.assets.jolifin.de 2 2026-09-02 2026-09-02 ok
www.jolifin.de 5 2026-04-27 2026-08-23 ok

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