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.

12 hosts · 354 ms

HostCertsFirst seenLast seenDNS
wcap.ca 10 2026-05-27 2026-09-26 ok
*.wcap.ca 1 2026-02-20 2026-02-20 —
link.wcap.ca 7 2026-06-03 2026-10-01 ok
data-handbook.wcap.ca 1 2026-08-06 2026-08-06 ok
mail.wcap.ca 4 2025-06-23 2026-07-23 ok
www.mail.wcap.ca 4 2025-06-23 2026-07-23 nxdomain
shakudo.wcap.ca 1 2025-09-19 2025-09-19 nxdomain
*.shakudo.wcap.ca 1 2025-09-19 2025-09-19 —
autodiscover.wcap.ca 4 2025-06-23 2026-07-23 ok
afenav.wcap.ca 3 2026-04-14 2026-09-28 ok
www.afenav.wcap.ca 3 2026-04-14 2026-09-28 nxdomain
www.wcap.ca 10 2026-05-27 2026-09-26 ok

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