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.

23 hosts · 211 ms

HostCertsFirst seenLast seen
nicmanager.academy 4 2026-06-05 2026-10-03
nis2.nicmanager.academy 5 2026-05-02 2026-08-30
domainsecurity-compliance.nicmanager.academy 5 2026-06-01 2026-09-29
share.nicmanager.academy 5 2026-04-26 2026-08-24
nis2-directive.nicmanager.academy 5 2026-04-22 2026-08-20
security-monitoring.nicmanager.academy 4 2026-06-09 2026-10-07
digital-bash.nicmanager.academy 4 2026-06-04 2026-10-02
www.digital-bash.nicmanager.academy 4 2026-04-16 2026-08-14
feedback.nicmanager.academy 5 2026-05-03 2026-08-31
www.feedback.nicmanager.academy 5 2026-05-14 2026-09-11
kurs-email-probleme-loesen.nicmanager.academy 5 2026-06-08 2026-10-06
lp.nicmanager.academy 5 2026-05-03 2026-08-31
webinar.nicmanager.academy 5 2026-04-22 2026-08-20
acs.nicmanager.academy 5 2026-05-11 2026-09-08
webinars.nicmanager.academy 10 2026-06-01 2026-09-29
mta-sts.nicmanager.academy 4 2026-04-20 2026-08-19
workshop-emailsicherheit.nicmanager.academy 5 2026-06-05 2026-10-03
emailzustellbarkeit.nicmanager.academy 5 2026-05-03 2026-08-31
kurs-emailzustellbarkeit.nicmanager.academy 5 2026-04-23 2026-08-21
test.nicmanager.academy 5 2026-04-30 2026-08-29
www.test.nicmanager.academy 4 2026-04-14 2026-08-13
dev.nicmanager.academy 6 2026-06-01 2026-09-29
cybersecurity.nicmanager.academy 5 2026-05-23 2026-09-20

Programmatic access: API GET /v1/hosts/nicmanager.academy (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/nicmanager.academy.