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.

21 hosts · 307 ms

HostCertsFirst seenLast seen
feierabend.de 1 2026-05-10 2026-05-10
lambda.feierabend.de 1 2026-02-16 2026-02-16
vc.feierabend.de 5 2026-05-31 2026-09-28
stage.feierabend.de 2 2025-11-22 2026-05-10
img.feierabend.de 2 2026-02-25 2026-07-13
wartung.feierabend.de 2 2026-03-04 2026-07-20
wh.feierabend.de 1 2026-02-17 2026-02-17
final.feierabend.de 2 2025-09-12 2026-08-12
video.feierabend.de 1 2026-02-18 2026-02-18
matomo.feierabend.de 5 2026-05-29 2026-09-24
aws.feierabend.de 1 2026-05-10 2026-05-10
secret.feierabend.de 2 2026-03-19 2026-08-19
boost.feierabend.de 1 2025-11-19 2025-11-19
stage-boost.feierabend.de 1 2025-11-19 2025-11-19
dev.feierabend.de 1 2026-05-10 2026-05-10
apigw.feierabend.de 1 2025-11-22 2025-11-22
www.feierabend.de 1 2026-05-10 2026-05-10
pay.feierabend.de 2 2026-03-08 2026-07-24
stage-pay.feierabend.de 1 2025-11-14 2025-11-14
sendy.feierabend.de 2 2026-04-09 2026-09-09
limesurvey.feierabend.de 5 2026-05-29 2026-09-24

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