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.

7 hosts · 252 ms

HostCertsFirst seenLast seen
trustmagnolia.com 14 2026-05-07 2026-09-26
*.trustmagnolia.com 4 2026-07-28 2026-09-26
webmail.trustmagnolia.com 6 2026-05-07 2026-09-06
app.trustmagnolia.com 4 2026-07-28 2026-09-25
*.app.trustmagnolia.com 4 2026-07-28 2026-09-25
autodiscover.trustmagnolia.com 6 2026-05-07 2026-09-06
www.trustmagnolia.com 6 2026-05-07 2026-09-06

Programmatic access: API GET /v1/hosts/trustmagnolia.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/trustmagnolia.com.