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.

22 hosts · 227 ms

HostCertsFirst seenLast seen
nordost.aok.de 3 2026-05-20 2026-06-10
*.nordost.aok.de 1 2026-05-20 2026-05-20
br0.nordost.aok.de 2 2025-12-16 2025-12-19
br1.nordost.aok.de 3 2026-04-02 2026-09-25
pcmaoknoad-iif77gqbhs.test.colt1.nordost.aok.de 1 2026-06-23 2026-06-23
pcmaoknoad-1mmxcbsotw.dev.colt1.nordost.aok.de 1 2026-06-23 2026-06-23
uc2.nordost.aok.de 4 2025-06-27 2026-06-18
uc-test2.nordost.aok.de 1 2026-05-21 2026-05-21
uc.nordost.aok.de 4 2025-06-27 2026-06-18
akn-cee-cluster1.uc.nordost.aok.de 4 2025-06-27 2026-06-18
akn-cee-fv-037.uc.nordost.aok.de 4 2025-06-27 2026-06-18
akn-cee-fv-038.uc.nordost.aok.de 4 2025-06-27 2026-06-18
caseplus-pflegeberatung.nordost.aok.de 1 2026-03-16 2026-03-16
mail.nordost.aok.de 3 2025-09-23 2026-10-01
appio.nordost.aok.de 3 2026-06-16 2026-06-23
smtp.nordost.aok.de 3 2025-09-23 2026-10-01
autodiscover.nordost.aok.de 3 2025-09-23 2026-10-01
uc-test.nordost.aok.de 1 2026-05-21 2026-05-21
akn-cee-ft-037.uc-test.nordost.aok.de 1 2026-05-21 2026-05-21
cxtest.nordost.aok.de 1 2026-09-14 2026-09-14
www.nordost.aok.de 1 2026-06-10 2026-06-10
cx.nordost.aok.de 1 2026-09-14 2026-09-14

Programmatic access: API GET /v1/hosts/nordost.aok.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/nordost.aok.de.