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.

10 hosts · 308 ms

HostCertsFirst seenLast seenDNS
doctorsofbc.ca 7 2025-11-06 2026-10-02 ok
*.doctorsofbc.ca 2 2025-11-06 2025-12-16 —
archive.doctorsofbc.ca 5 2026-06-04 2026-10-02 ok
auth.doctorsofbc.ca 10 2026-05-11 2026-09-07 ok
servicedesk.doctorsofbc.ca 10 2026-04-24 2026-08-20 ok
onedesk.doctorsofbc.ca 3 2025-10-07 2026-08-18 ok
go.doctorsofbc.ca 4 2026-04-15 2026-08-31 ok
financials.doctorsofbc.ca 4 2026-06-04 2026-10-02 ok
www.doctorsofbc.ca 5 2026-06-04 2026-10-02 ok
checkbox.doctorsofbc.ca 5 2026-05-31 2026-09-19 ok

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