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 · 266 ms

HostCertsFirst seenLast seen
amazon.lu 2 2026-03-10 2026-07-26
luna.amazon.lu 2 2025-08-14 2026-07-15
www.amazon.lu 2 2026-03-10 2026-07-26

Programmatic access: API GET /v1/hosts/amazon.lu (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/amazon.lu.