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.

10 hosts · 222 ms

HostCertsFirst seenLast seenDNS
ilgiorno.it 12 2026-04-14 2026-08-26 ok
*.ilgiorno.it 13 2025-12-18 2026-08-26 —
primapagina.ilgiorno.it 4 2026-04-20 2026-08-20 ok
test.prime.ilgiorno.it 2 2026-06-03 2026-06-03 ok
landing.ilgiorno.it 4 2026-04-11 2026-08-10 ok
origin-landing.ilgiorno.it 4 2026-04-11 2026-08-10 ok
70anni.ilgiorno.it 5 2026-05-25 2026-09-24 ok
demo.70anni.ilgiorno.it 4 2026-05-16 2026-07-16 ok
meteo.ilgiorno.it 4 2026-04-12 2026-08-10 ok
newsletter.ilgiorno.it 6 2026-05-20 2026-09-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ilgiorno.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/ilgiorno.it.