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.

4 hosts · 278 ms

HostCertsFirst seenLast seenDNS
basisset.ventures 9 2026-04-13 2026-08-09 ok
app.basisset.ventures 5 2026-05-22 2026-09-09 ok
www.app.basisset.ventures 5 2026-05-15 2026-09-07 ok
www.basisset.ventures 12 2026-04-13 2026-08-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/basisset.ventures (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/basisset.ventures.