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 · 225 ms

HostCertsFirst seenLast seen
solaard.com 5 2026-02-20 2026-08-17
association.solaard.com 3 2026-04-29 2026-09-29
*.association.solaard.com 3 2026-04-29 2026-09-29
www.solaard.com 4 2026-04-21 2026-08-17

Programmatic access: API GET /v1/hosts/solaard.com (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/solaard.com.