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.

20 hosts · 210 ms

HostCertsFirst seenLast seen
think11.de 5 2026-05-05 2026-09-02
ceva.think11.de 3 2026-05-25 2026-09-10
wa.think11.de 2 2026-04-30 2026-04-30
*.wa.think11.de 2 2026-04-30 2026-04-30
nfc.think11.de 5 2026-05-05 2026-09-02
intelligence.think11.de 3 2026-09-21 2026-09-21
suite.think11.de 3 2026-05-01 2026-08-27
93589398k78runri3dxffu3fnuiuf.think11.de 3 2026-05-04 2026-08-21
mailing.think11.de 10 2026-05-22 2026-09-17
omki.think11.de 5 2026-05-05 2026-09-02
crm.think11.de 4 2026-04-17 2026-10-11
scan.think11.de 5 2026-05-05 2026-09-02
sign.think11.de 3 2026-06-22 2026-09-07
remap.think11.de 11 2026-05-19 2026-09-14
zsp.think11.de 5 2026-04-23 2026-10-03
dinner.think11.de 3 2026-05-09 2026-08-30
newsletter.think11.de 5 2026-04-26 2026-08-24
signatur.think11.de 5 2026-04-20 2026-09-30
reviews.think11.de 5 2026-05-05 2026-09-02
www.think11.de 5 2026-05-05 2026-09-02

Programmatic access: API GET /v1/hosts/think11.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/think11.de.