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 · 217 ms

HostCertsFirst seenLast seenDNS
rendimax.it 9 2026-05-10 2026-09-05 ok
vincoloevinco.rendimax.it 9 2025-07-23 2026-08-19 ok
uatvincoloevinco.rendimax.it 9 2025-07-23 2026-08-19 ok
www.rendimax.it 9 2026-05-10 2026-09-05 ok

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