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 · 164 ms

HostCertsFirst seenLast seen
steel-craft.ca 3 2026-04-23 2026-07-30
*.steel-craft.ca 3 2026-04-23 2026-07-30
dashboard.steel-craft.ca 3 2026-04-23 2026-07-30
test-dashboard.steel-craft.ca 3 2026-04-23 2026-07-30
doordesigner.steel-craft.ca 3 2026-04-23 2026-07-30
test.steel-craft.ca 3 2026-04-23 2026-07-30
dev.steel-craft.ca 3 2026-04-23 2026-07-30
www.steel-craft.ca 3 2026-04-23 2026-07-30

Programmatic access: API GET /v1/hosts/steel-craft.ca (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/steel-craft.ca.