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.

8 hosts · 350 ms

HostCertsFirst seenLast seenDNS
orain.eus 8 2025-07-15 2026-07-15 ok
*.orain.eus 2 2026-01-23 2026-03-03 —
data.orain.eus 2 2026-04-25 2026-04-25 ok
stage.orain.eus 5 2026-04-29 2026-08-27 ok
login.stage.orain.eus 10 2025-08-19 2026-09-10 ok
track.orain.eus 1 2025-12-24 2025-12-24 ok
login.orain.eus 6 2025-08-12 2026-09-16 ok
www.orain.eus 5 2025-07-15 2026-07-15 ok

Programmatic access, with DNS A records: API GET /v1/hosts/orain.eus (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/orain.eus.