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 · 263 ms

HostCertsFirst seenLast seen
qc-immigration.com 10 2026-04-29 2026-09-03
*.qc-immigration.com 5 2026-04-29 2026-08-30
scorecard.qc-immigration.com 19 2026-06-05 2026-10-09
gtm.qc-immigration.com 5 2026-05-01 2026-08-29
lp.qc-immigration.com 10 2026-04-25 2026-10-07

Programmatic access: API GET /v1/hosts/qc-immigration.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/qc-immigration.com.