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 · 263 ms

HostCertsFirst seenLast seenDNS
orpi.com 19 2026-02-16 2026-09-21 ok
*.orpi.com 19 2026-02-16 2026-09-21 —
jeparraine.orpi.com 5 2026-04-27 2026-08-26 ok
formation.orpi.com 5 2026-05-30 2026-09-27 ok
metrics.orpi.com 3 2026-04-26 2026-08-16 ok
maps.orpi.com 5 2026-05-02 2026-08-30 ok
evenements.orpi.com 10 2026-05-15 2026-09-10 ok

Programmatic access, with DNS A records: API GET /v1/hosts/orpi.com (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/orpi.com.