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.

13 hosts · 361 ms

HostCertsFirst seenLast seenDNS
clerk.ai 7 2026-03-24 2026-09-22 ok
*.clerk.ai 2 2026-03-24 2026-08-24 —
beta.clerk.ai 5 2026-05-24 2026-09-25 ok
public.clerk.ai 3 2026-04-25 2026-09-25 ok
shared.clerk.ai 2 2026-04-18 2026-09-18 ok
consul.prod.clerk.ai 1 2026-07-29 2026-07-29 nxdomain
nemotron.prod.clerk.ai 1 2026-09-12 2026-09-12 nxdomain
app.clerk.ai 3 2026-06-13 2026-08-13 ok
docs.clerk.ai 1 2026-09-02 2026-09-02 ok
links.clerk.ai 4 2026-07-08 2026-07-13 ok
status.clerk.ai 4 2026-04-20 2026-08-18 ok
consul.dev.clerk.ai 1 2026-07-29 2026-07-29 nxdomain
www.clerk.ai 5 2026-05-20 2026-09-23 ok

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