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.

6 hosts · 268 ms

HostCertsFirst seenLast seen
zalando.at 9 2025-06-30 2026-09-23
umfrage.zalando.at 5 2026-04-18 2026-09-18
corporate.zalando.at 3 2025-10-28 2026-09-28
exclusive.zalando.at 11 2025-06-23 2026-09-20
clicks.hello.zalando.at 1 2025-12-21 2025-12-21
www.zalando.at 11 2025-06-23 2026-09-20

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