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.

12 hosts · 251 ms

HostCertsFirst seenLast seen
cecil-mode.be 14 2026-02-16 2026-09-16
mxa.cecil-mode.be 10 2026-02-16 2026-09-23
integ-bc.cecil-mode.be 10 2026-05-03 2026-08-30
prod.cecil-mode.be 8 2026-05-03 2026-08-29
irl.prod.cecil-mode.be 10 2026-04-16 2026-08-12
autodiscover.customerservice.cecil-mode.be 10 2026-05-11 2026-09-09
integ.cecil-mode.be 10 2026-05-04 2026-08-30
ssgtm.cecil-mode.be 6 2026-04-26 2026-08-22
integ.ssgtm.cecil-mode.be 10 2026-04-21 2026-08-18
autodiscover.cecil-mode.be 10 2026-05-11 2026-09-09
dev.cecil-mode.be 8 2026-05-04 2026-08-30
www.cecil-mode.be 10 2026-02-16 2026-09-13

Programmatic access: API GET /v1/hosts/cecil-mode.be (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/cecil-mode.be.