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 · 310 ms

HostCertsFirst seenLast seenDNS
cdcc.ca 6 2025-11-10 2026-08-25 ok
*.cdcc.ca 5 2025-11-10 2026-02-03 —
*.qa.cdcc.ca 5 2025-11-10 2026-02-03 —
*.staging.cdcc.ca 5 2025-11-10 2026-02-03 —
*.gte2.portal.cdcc.ca 1 2026-02-05 2026-02-05 —
*.gte3.portal.cdcc.ca 1 2026-02-05 2026-02-05 —
*.gte4.portal.cdcc.ca 1 2026-01-15 2026-01-15 —
collateral.portal.cdcc.ca 1 2026-01-15 2026-01-15 ok
app.cdcc.ca 22 2026-05-03 2026-08-30 ok
rules.cdcc.ca 5 2026-05-14 2026-09-11 ok
connect.cdcc.ca 1 2025-11-19 2025-11-19 ok
www.connect.cdcc.ca 1 2025-11-19 2025-11-19 nxdomain
*.dev.cdcc.ca 5 2025-11-10 2026-02-03 —

Programmatic access, with DNS A records: API GET /v1/hosts/cdcc.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/cdcc.ca.