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 · 236 ms

HostCertsFirst seenLast seen
zalando.sk 9 2025-06-30 2026-09-23
exclusive.zalando.sk 11 2025-06-23 2026-09-20
clicks.hello.zalando.sk 1 2025-12-19 2025-12-19
www.zalando.sk 11 2025-06-23 2026-09-20

Programmatic access: API GET /v1/hosts/zalando.sk (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/zalando.sk.