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.

5 hosts · 261 ms

HostCertsFirst seenLast seenDNS
zlavomat.sk 24 2026-05-30 2026-10-06 ok
*.zlavomat.sk 24 2026-05-30 2026-10-06 —
api.zlavomat.sk 4 2026-04-18 2026-09-15 ok
link.zlavomat.sk 1 2025-12-17 2025-12-17 ok
kozel.zlavomat.sk 5 2026-04-24 2026-10-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/zlavomat.sk (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/zlavomat.sk.