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.

10 hosts · 258 ms

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HostCertsFirst seenLast seen
juul.ca 1 2025-12-11 2025-12-11
*.juul.ca 7 2025-07-12 2026-08-29
wholesale.juul.ca 2 2025-07-12 2026-06-12
app.juul.ca 5 2025-12-17 2026-10-19
*.app.juul.ca 1 2025-12-16 2025-12-16
preprod.app.juul.ca 1 2025-12-16 2025-12-16
stage.app.juul.ca 1 2025-10-12 2025-10-12
partner.juul.ca 2 2026-03-29 2026-08-29
support.juul.ca 1 2026-02-24 2026-02-24
www.juul.ca 2 2025-09-21 2026-08-22

Programmatic access: API GET /v1/hosts/juul.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/juul.ca.