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 · 183 ms

Download CSV
HostCertsFirst seenLast seen
tb.buildingpartners.de 5 2026-05-10 2026-09-07
*.tb.buildingpartners.de 2 2026-05-10 2026-05-10
download.buildingpartners.de 4 2026-06-16 2026-10-14
*.download.buildingpartners.de 2 2026-06-16 2026-06-16
umfrage.buildingpartners.de 5 2026-04-24 2026-08-22

Programmatic access: API GET /v1/hosts/buildingpartners.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/buildingpartners.de.