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.

4 hosts · 209 ms

HostCertsFirst seenLast seen
legalwills.ca 23 2026-05-14 2026-09-19
*.legalwills.ca 23 2026-05-14 2026-09-19
signature.legalwills.ca 7 2026-04-23 2026-09-14
mail.legalwills.ca 5 2026-05-21 2026-09-10

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