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 · 349 ms

HostCertsFirst seenLast seen
tantrachair.com 1 2025-11-26 2025-11-26
staging.tantrachair.com 3 2026-06-10 2026-08-10
production.tantrachair.com 4 2026-04-14 2026-08-14
www.tantrachair.com 1 2025-11-26 2025-11-26

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