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.

10 hosts · 257 ms

HostCertsFirst seenLast seenDNS
kingsmen.studio 15 2025-07-27 2026-09-23 ok
public.kingsmen.studio 5 2026-04-26 2026-08-31 ok
catalog.kingsmen.studio 1 2026-10-06 2026-10-06 ok
auth.kingsmen.studio 6 2026-05-08 2026-09-23 ok
admin.kingsmen.studio 5 2026-04-26 2026-08-30 ok
help.kingsmen.studio 6 2026-04-22 2026-08-19 ok
app.kingsmen.studio 25 2026-04-20 2026-10-06 ok
os.kingsmen.studio 1 2026-09-13 2026-09-13 ok
limits.kingsmen.studio 1 2026-10-06 2026-10-06 ok
www.kingsmen.studio 6 2025-07-27 2026-09-24 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kingsmen.studio (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/kingsmen.studio.