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 · 208 ms

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HostCertsFirst seenLast seen
vicinimiei.it 8 2025-09-11 2026-08-23
*.vicinimiei.it 3 2025-09-11 2026-08-13
www.vicinimiei.it 5 2026-04-27 2026-08-23

Programmatic access: API GET /v1/hosts/vicinimiei.it (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/vicinimiei.it.