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.

3 hosts · 288 ms

HostCertsFirst seenLast seenDNS
vanislewindows.com 16 2025-08-20 2026-09-30 ok
*.vanislewindows.com 11 2025-08-20 2026-09-30 —
www.vanislewindows.com 5 2026-05-02 2026-09-02 ok

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