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.

31 hosts · 255 ms

HostCertsFirst seenLast seenDNS
kudelskisecurity.com 94 2026-04-12 2026-10-02 ok
*.kudelskisecurity.com 11 2026-05-20 2026-09-29 —
drand.kudelskisecurity.com 5 2026-05-11 2026-09-09 ok
wef.kudelskisecurity.com 1 2025-10-01 2025-10-01 ok
portal-staging.kudelskisecurity.com 26 2026-04-12 2026-09-05 ok
iam-staging.kudelskisecurity.com 10 2026-04-23 2026-08-20 ok
portal.kudelskisecurity.com 12 2026-04-14 2026-08-11 ok
iam.kudelskisecurity.com 10 2026-04-24 2026-08-21 ok
ctem.kudelskisecurity.com 4 2026-03-18 2026-08-18 ok
*.ctem.kudelskisecurity.com 4 2026-03-18 2026-08-18 —
backend.ctem.kudelskisecurity.com 4 2026-03-18 2026-08-18 ok
auth.ctem.kudelskisecurity.com 10 2026-04-22 2026-08-20 ok
api.ctem.kudelskisecurity.com 4 2026-03-18 2026-08-18 nxdomain
*.api.ctem.kudelskisecurity.com 2 2026-03-18 2026-08-18 —
internal.ctem.kudelskisecurity.com 2 2026-03-18 2026-08-18 nxdomain
*.internal.ctem.kudelskisecurity.com 2 2026-03-18 2026-08-18 —
*.backend.internal.ctem.kudelskisecurity.com 2 2026-03-18 2026-08-18 —
app.ctem.kudelskisecurity.com 4 2026-03-18 2026-08-18 nxdomain
login.kudelskisecurity.com 10 2026-04-24 2026-08-21 ok
ctem-demo.kudelskisecurity.com 2 2026-02-28 2026-07-16 ok
*.ctem-demo.kudelskisecurity.com 2 2026-02-28 2026-07-16 —
backend.ctem-demo.kudelskisecurity.com 2 2026-02-28 2026-07-16 nxdomain
api.ctem-demo.kudelskisecurity.com 2 2026-02-28 2026-07-16 nxdomain
app.ctem-demo.kudelskisecurity.com 2 2026-02-28 2026-07-16 nxdomain
resources.kudelskisecurity.com 10 2026-04-23 2026-09-10 ok
careers.kudelskisecurity.com 10 2026-04-23 2026-08-19 ok
splunk-events.kudelskisecurity.com 4 2026-04-14 2026-08-17 ok
mta-sts.kudelskisecurity.com 16 2026-06-06 2026-10-02 ok
status.kudelskisecurity.com 5 2026-04-11 2026-10-06 ok
portal-staging-test.kudelskisecurity.com 15 2026-05-09 2026-09-04 nxdomain
www.kudelskisecurity.com 8 2026-05-09 2026-09-04 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kudelskisecurity.com (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/kudelskisecurity.com.