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 · 233 ms

HostCertsFirst seenLast seen
exquisitehtx.com 4 2026-06-11 2026-10-09
portal.exquisitehtx.com 5 2026-06-02 2026-09-09
www.portal.exquisitehtx.com 5 2026-06-02 2026-09-09
www.exquisitehtx.com 4 2026-06-11 2026-10-09

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