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.

19 hosts · 271 ms

HostCertsFirst seenLast seenDNS
uniwunder.de 5 2026-05-23 2026-09-20 ok
staging.uniwunder.de 4 2026-04-18 2026-08-15 ok
api.uniwunder.de 5 2026-05-23 2026-09-20 ok
unisign.uniwunder.de 5 2026-05-23 2026-09-20 ok
admin.uniwunder.de 5 2026-05-23 2026-09-20 ok
mlp.uniwunder.de 5 2026-05-23 2026-09-20 ok
arbeitgeber.uniwunder.de 5 2026-05-23 2026-09-20 ok
jobs.uniwunder.de 5 2026-05-23 2026-09-20 ok
api.jobs.uniwunder.de 5 2026-05-23 2026-09-20 ok
admin.jobs.uniwunder.de 6 2026-05-23 2026-09-20 ok
api.test.uniwunder.de 5 2026-06-06 2026-10-03 ok
unisign.test.uniwunder.de 5 2026-05-27 2026-09-24 ok
admin.test.uniwunder.de 5 2026-06-06 2026-10-03 ok
mlp.test.uniwunder.de 5 2026-05-16 2026-09-13 ok
arbeitgeber.test.uniwunder.de 5 2026-05-16 2026-09-13 ok
jobs.test.uniwunder.de 5 2026-05-16 2026-09-13 ok
api.jobs.test.uniwunder.de 5 2026-05-16 2026-09-13 ok
admin.jobs.test.uniwunder.de 5 2026-05-16 2026-09-13 ok
www.uniwunder.de 5 2026-05-23 2026-09-20 ok

Programmatic access, with DNS A records: API GET /v1/hosts/uniwunder.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/uniwunder.de.