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.

6 hosts · 290 ms

HostCertsFirst seenLast seenDNS
advenis.com 4 2026-03-26 2026-09-14 ok
*.advenis.com 4 2026-03-26 2026-09-14 —
preprod.advenis.com 5 2026-06-02 2026-09-30 ok
signature.advenis.com 5 2026-06-16 2026-09-14 ok
preprod-auth.advenis.com 5 2026-05-13 2026-09-10 ok
www.advenis.com 5 2026-05-31 2026-09-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/advenis.com (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/advenis.com.