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.

9 hosts · 231 ms

HostCertsFirst seenLast seenDNS
vivus.es 12 2026-05-03 2026-08-30 ok
*.vivus.es 7 2025-07-14 2026-09-11 —
ea.vivus.es 4 2026-04-12 2026-08-10 ok
cola.vivus.es 5 2026-04-24 2026-08-22 nodata
go.vivus.es 5 2026-05-30 2026-09-27 ok
content.vivus.es 1 2026-10-06 2026-10-06 ok
www.content.vivus.es 1 2026-10-06 2026-10-06 nxdomain
www.vivus.es 8 2026-05-02 2026-08-28 ok
survey.vivus.es 2 2026-09-09 2026-09-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/vivus.es (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/vivus.es.