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.

3 hosts · 270 ms

HostCertsFirst seenLast seen
eftm.com 9 2025-08-05 2026-09-04
*.eftm.com 9 2025-08-05 2026-09-04
shop.eftm.com 15 2026-05-21 2026-09-30

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