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 · 241 ms

HostCertsFirst seenLast seen
denksport.com 24 2026-04-19 2026-09-27
*.denksport.com 19 2026-04-19 2026-09-27
cloud.denksport.com 2 2026-04-23 2026-09-25
actie.denksport.com 5 2026-06-08 2026-10-06
image.email.denksport.com 4 2026-01-05 2026-08-17
click.email.denksport.com 2 2026-04-23 2026-09-24
view.email.denksport.com 3 2026-04-23 2026-09-24
login.denksport.com 3 2026-05-17 2026-09-30
admin.app.denksport.com 2 2026-08-06 2026-09-30
play.app.denksport.com 2 2026-08-06 2026-09-30
qr.denksport.com 4 2026-04-25 2026-08-23
uat.denksport.com 3 2026-06-10 2026-08-12
login.uat.denksport.com 3 2026-05-12 2026-09-24
play.uat.denksport.com 5 2026-05-07 2026-08-26
test.denksport.com 5 2026-05-01 2026-09-02
puzzelen.test.denksport.com 5 2026-05-24 2026-09-11
login.test.denksport.com 3 2026-05-11 2026-09-23
play.test.denksport.com 5 2026-05-07 2026-08-26
www.denksport.com 4 2026-04-21 2026-08-25
play.denksport.com 5 2026-05-19 2026-09-06

Programmatic access: API GET /v1/hosts/denksport.com (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/denksport.com.