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 · 234 ms

HostCertsFirst seenLast seen
zota.eu 9 2026-05-08 2026-09-03
*.zota.eu 12 2025-12-07 2026-09-03
url730.zota.eu 2 2026-09-09 2026-09-09
id.zota.eu 2 2026-09-08 2026-09-08

Programmatic access: API GET /v1/hosts/zota.eu (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/zota.eu.