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.

24 hosts · 275 ms

HostCertsFirst seenLast seenDNS
m1.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res1.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t1.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m2.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res2.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t2.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m3.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res3.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t3.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t.service.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m1.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res1.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t1.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m2.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res2.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t2.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m3.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res3.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t3.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
m.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
res.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok
t.marketing.ryanairemail.it 5 2025-08-21 2026-08-27 ok

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