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.

28 hosts · 201 ms

HostCertsFirst seenLast seen
frankonia.de 13 2026-02-19 2026-10-09
*.frankonia.de 37 2026-02-19 2026-10-09
data.frankonia.de 3 2026-05-27 2026-09-12
www.data.frankonia.de 3 2026-05-18 2026-09-03
*.b2b.frankonia.de 6 2026-05-29 2026-10-09
*.staging.b2b.frankonia.de 6 2026-05-29 2026-10-09
d.frankonia.de 10 2026-04-30 2026-09-27
hybrid.frankonia.de 1 2026-03-03 2026-03-03
service.frankonia.de 6 2026-05-07 2026-09-14
test2-service.frankonia.de 3 2026-09-14 2026-10-08
test-service.frankonia.de 2 2026-09-14 2026-10-08
te.frankonia.de 3 2025-12-29 2026-08-28
*.live.frankonia.de 4 2026-06-10 2026-10-09
*.munitionssonderverkauf.frankonia.de 6 2026-05-04 2026-10-09
wnyywf.frankonia.de 4 2026-05-12 2026-10-05
*.staging.frankonia.de 6 2026-05-29 2026-10-09
*.testing.frankonia.de 12 2026-05-20 2026-10-09
*.sp.testing.frankonia.de 6 2026-05-20 2026-10-09
blog.frankonia.de 7 2026-05-21 2026-10-03
email.frankonia.de 1 2026-03-03 2026-03-03
fjeap.frankonia.de 1 2026-01-15 2026-01-15
www.fjeap.frankonia.de 1 2026-01-15 2026-01-15
tp.frankonia.de 2 2026-01-20 2026-08-28
bilder.frankonia.de 1 2025-11-27 2025-11-27
autodiscover.frankonia.de 1 2026-03-03 2026-03-03
news.frankonia.de 5 2026-05-02 2026-08-30
rz.frankonia.de 6 2026-05-18 2026-10-09
*.rz.frankonia.de 6 2026-05-18 2026-10-09

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