Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

5 hosts · 194 ms

Download CSV
HostCertsFirst seenLast seen
cloud.mail.immobilienscout24.de 2 2026-08-28 2026-08-28
image.mail.immobilienscout24.de 5 2026-04-21 2026-09-28
bestaetigung.mail.immobilienscout24.de 1 2026-06-05 2026-06-05
click.mail.immobilienscout24.de 1 2026-06-05 2026-06-05
view.mail.immobilienscout24.de 1 2026-06-05 2026-06-05

Programmatic access: API GET /v1/hosts/mail.immobilienscout24.de (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/mail.immobilienscout24.de.