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.

7 hosts · 312 ms

HostCertsFirst seenLast seenDNS
aqua2000.fr 10 2026-05-30 2026-09-27 ok
tipi.aqua2000.fr 7 2026-04-19 2026-10-04 ok
back.aqua2000.fr 10 2026-05-06 2026-09-05 ok
link.aqua2000.fr 6 2026-04-25 2026-09-08 ok
postal.aqua2000.fr 10 2026-05-08 2026-09-05 ok
www.aqua2000.fr 10 2026-05-30 2026-09-27 ok
foundy.aqua2000.fr 8 2026-04-14 2026-08-13 ok

Programmatic access, with DNS A records: API GET /v1/hosts/aqua2000.fr (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/aqua2000.fr.