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.

7 hosts · 230 ms

HostCertsFirst seenLast seenDNS
timeshark.ai 9 2026-04-24 2026-08-20 ok
*.timeshark.ai 2 2025-11-28 2026-02-16 —
prod.timeshark.ai 1 2026-02-03 2026-02-03 nodata
*.prod.timeshark.ai 1 2026-02-03 2026-02-03 —
order.timeshark.ai 3 2026-06-16 2026-08-24 ok
app-dev.timeshark.ai 7 2026-05-31 2026-10-01 ok
www.timeshark.ai 10 2026-05-05 2026-09-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/timeshark.ai (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/timeshark.ai.