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.

22 hosts · 260 ms

HostCertsFirst seenLast seenDNS
agenda-software.de 9 2025-07-07 2026-09-19 ok
*.agenda-software.de 8 2025-07-07 2026-09-19 —
dasi10.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi01.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi11.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi02.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi12.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi03.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi13.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi04.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi14.agenda-software.de 1 2026-08-07 2026-08-07 ok
dasi05.agenda-software.de 3 2026-08-06 2026-10-05 ok
dasi15.agenda-software.de 1 2026-08-07 2026-08-07 ok
dasi06.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi07.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi08.agenda-software.de 2 2026-08-06 2026-10-05 ok
dasi09.agenda-software.de 2 2026-08-06 2026-10-05 ok
service.agenda-software.de 4 2026-04-15 2026-09-02 ok
downloadservice.agenda-software.de 4 2026-04-15 2026-09-02 ok
dasionline.agenda-software.de 1 2026-08-07 2026-08-07 ok
email.agenda-software.de 5 2026-05-10 2026-09-06 ok
sst.agenda-software.de 4 2026-04-25 2026-08-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/agenda-software.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/agenda-software.de.