Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

4 hosts · 382 ms

HostCertsFirst seenLast seenDNS
f-logic.it 12 2025-09-30 2026-08-19 ok
*.f-logic.it 8 2025-09-30 2026-08-19 —
mx00.f-logic.it 4 2026-04-19 2026-08-16 ok
www.f-logic.it 4 2026-05-13 2026-07-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/f-logic.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/f-logic.it.