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 · 275 ms

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HostCertsFirst seenLast seen
bramburky.cz 2 2025-12-23 2026-05-18
*.bramburky.cz 1 2026-05-18 2026-05-18
hqserver1.bramburky.cz 1 2025-12-23 2025-12-23
hqserver2.bramburky.cz 1 2025-12-23 2025-12-23
hq.bramburky.cz 1 2025-12-23 2025-12-23
nas.bramburky.cz 1 2025-12-23 2025-12-23
ups.bramburky.cz 1 2025-12-23 2025-12-23
www.bramburky.cz 1 2025-12-23 2025-12-23

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