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.

8 hosts · 161 ms

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HostCertsFirst seenLast seen
svetla24.cz 5 2026-04-28 2026-08-26
exufyf.svetla24.cz 4 2026-05-13 2026-10-05
xtg.svetla24.cz 8 2026-06-09 2026-10-05
servis.svetla24.cz 5 2026-05-09 2026-09-06
news.svetla24.cz 3 2026-06-17 2026-08-15
support.svetla24.cz 16 2026-05-31 2026-09-26
collector.sst.svetla24.cz 4 2026-06-12 2026-10-10
www.svetla24.cz 5 2026-04-28 2026-08-26

Programmatic access: API GET /v1/hosts/svetla24.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/svetla24.cz.