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.

40 hosts · 294 ms

HostCertsFirst seenLast seen
ruv-bkk.de 97 2026-03-09 2026-10-01
*.ruv-bkk.de 7 2026-03-09 2026-09-14
vpn-gate-1.ruv-bkk.de 3 2026-07-09 2026-09-07
vpn-gate-2.ruv-bkk.de 4 2026-07-16 2026-09-15
vpn-gate-3.ruv-bkk.de 3 2026-07-20 2026-09-18
vpn-gate-4.ruv-bkk.de 3 2026-07-20 2026-09-18
reha.ruv-bkk.de 1 2026-04-29 2026-04-29
collab-edge.ruv-bkk.de 14 2026-06-26 2026-09-23
kassenvergleiche.ruv-bkk.de 101 2026-04-23 2026-10-06
danke.ruv-bkk.de 44 2026-04-24 2026-06-23
meine.ruv-bkk.de 2 2026-01-21 2026-01-21
app.meine.ruv-bkk.de 2 2026-01-21 2026-01-21
krankenkasse.ruv-bkk.de 27 2026-04-21 2026-10-01
zertifikate.ruv-bkk.de 6 2026-05-19 2026-09-16
ozg.ruv-bkk.de 5 2026-05-08 2026-09-05
app-relaunch.ruv-bkk.de 5 2026-05-08 2026-09-05
cash4health.ruv-bkk.de 24 2026-04-27 2026-10-02
ehealth.ruv-bkk.de 1 2026-09-14 2026-09-14
mvk.ruv-bkk.de 1 2026-04-29 2026-04-29
bkkinform.ruv-bkk.de 4 2026-04-19 2026-08-17
gesundbleiben.ruv-bkk.de 43 2026-04-19 2026-06-18
meine-einstellungen.ruv-bkk.de 5 2026-05-29 2026-09-26
turn.ruv-bkk.de 2 2026-06-03 2026-06-03
fw-mgm-colo.ruv-bkk.de 20 2026-04-11 2026-04-27
newsletter.ruv-bkk.de 4 2026-04-16 2026-08-13
socials.ruv-bkk.de 10 2026-04-26 2026-08-22
forms.ruv-bkk.de 2 2026-01-21 2026-01-21
mta-sts.ruv-bkk.de 5 2026-05-23 2026-09-18
meinbonus.ruv-bkk.de 4 2026-06-08 2026-10-06
api-meinbonus.ruv-bkk.de 11 2026-04-15 2026-09-24
staging.meinbonus.ruv-bkk.de 4 2026-06-08 2026-10-06
demo.meinbonus.ruv-bkk.de 4 2026-06-08 2026-10-06
status.ruv-bkk.de 5 2026-05-23 2026-09-20
carepilot.ruv-bkk.de 4 2026-06-08 2026-10-06
staging.carepilot.ruv-bkk.de 4 2026-06-08 2026-10-06
cms.carepilot.ruv-bkk.de 4 2026-06-08 2026-10-06
staging.cms.carepilot.ruv-bkk.de 4 2026-06-08 2026-10-06
ozgtest.ruv-bkk.de 10 2026-04-22 2026-09-05
www.ruv-bkk.de 95 2026-04-21 2026-10-01
fw-recovery.ruv-bkk.de 19 2026-04-13 2026-04-28

Programmatic access: API GET /v1/hosts/ruv-bkk.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/ruv-bkk.de.