Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

15 hosts · 200 ms

Download CSV
HostCertsFirst seenLast seen
datadorf.de 6 2026-05-20 2026-09-18
nb.datadorf.de 5 2026-05-20 2026-09-18
genaucloud.datadorf.de 7 2026-05-04 2026-09-28
share.datadorf.de 13 2026-05-14 2026-09-21
paste.datadorf.de 4 2026-06-19 2026-10-19
www.paste.datadorf.de 4 2026-06-19 2026-10-19
autoconfig.datadorf.de 6 2026-06-02 2026-10-01
mail.datadorf.de 6 2026-06-02 2026-10-01
termin.datadorf.de 6 2026-06-19 2026-09-21
www.termin.datadorf.de 3 2026-06-19 2026-08-19
autodiscover.datadorf.de 6 2026-06-02 2026-10-01
mta-sts.datadorf.de 11 2026-06-02 2026-10-01
support.datadorf.de 4 2026-06-18 2026-10-17
www.support.datadorf.de 4 2026-06-18 2026-10-17
www.datadorf.de 6 2026-05-20 2026-09-18

Programmatic access: API GET /v1/hosts/datadorf.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/datadorf.de.