Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

5 hosts · 254 ms

HostCertsFirst seenLast seen
suitespot.ai 18 2026-05-16 2026-09-11
blog.suitespot.ai 14 2026-05-16 2026-09-11
resources.suitespot.ai 16 2026-05-16 2026-09-11
mta-sts.suitespot.ai 5 2026-06-06 2026-10-04
www.suitespot.ai 16 2026-05-16 2026-09-11

Programmatic access: API GET /v1/hosts/suitespot.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/suitespot.ai.