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.

20 hosts · 231 ms

HostCertsFirst seenLast seen
dm.cz 7 2026-05-07 2026-10-01
*.dm.cz 5 2026-05-14 2026-08-25
CZBWACGW1.dm.cz 2 2026-03-30 2026-10-07
omc.dm.cz 1 2026-01-06 2026-01-06
service.dm.cz 2 2026-09-14 2026-09-14
termsofuse.dm.cz 5 2026-05-28 2026-09-25
mail-link.dm.cz 4 2026-04-20 2026-08-18
exc.mm.dm.cz 2 2025-07-24 2026-06-23
exc.t.mm.dm.cz 1 2026-02-13 2026-02-13
ssa.om.dm.cz 5 2026-04-21 2026-09-28
ssa-preview.om.dm.cz 5 2026-04-23 2026-10-01
sandbox.om.dm.cz 3 2026-05-26 2026-09-07
ressourcen.dm.cz 10 2026-05-05 2026-09-17
*.intern.dm.cz 5 2026-05-19 2026-08-25
*.review.intern.dm.cz 5 2026-05-19 2026-08-25
discoverreceiver.dm.cz 1 2025-12-02 2025-12-02
autodiscover.dm.cz 3 2025-09-29 2026-09-18
cs.dm.cz 5 2026-05-22 2026-09-19
mta-sts.dm.cz 5 2026-05-20 2026-08-16
omt.dm.cz 1 2026-01-05 2026-01-05

Programmatic access: API GET /v1/hosts/dm.cz (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/dm.cz.