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.

8 hosts · 307 ms

HostCertsFirst seenLast seen
brandymail.com 6 2026-05-02 2026-09-06
auth.brandymail.com 5 2026-04-28 2026-08-28
admin.brandymail.com 5 2026-04-23 2026-08-25
app.brandymail.com 5 2026-04-28 2026-08-30
docs.brandymail.com 2 2026-08-05 2026-10-07
partners.brandymail.com 3 2026-06-17 2026-08-17
status.brandymail.com 2 2026-08-11 2026-08-11
www.brandymail.com 5 2026-04-27 2026-08-30

Programmatic access: API GET /v1/hosts/brandymail.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/brandymail.com.