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 · 301 ms

HostCertsFirst seenLast seenDNS
jetpropilots.com 23 2026-04-22 2026-10-01 ok
*.jetpropilots.com 13 2026-05-02 2026-10-01 —
triptrac.jetpropilots.com 5 2026-05-14 2026-09-12 ok
admin.jetpropilots.com 5 2026-05-14 2026-09-12 ok
expenses.jetpropilots.com 5 2026-05-01 2026-08-30 ok
www.jetpropilots.com 10 2026-04-22 2026-09-23 ok

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