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 · 229 ms

HostCertsFirst seenLast seen
power.dk 2 2025-06-30 2026-07-27
*.power.dk 3 2025-06-30 2026-07-27
feedback.power.dk 5 2026-05-30 2026-09-27
link.power.dk 6 2026-04-16 2026-09-25
backoffice.flowretail.power.dk 3 2025-10-07 2026-03-25
api.flowretail.power.dk 3 2025-10-07 2026-03-25
admin.flowretail.power.dk 2 2025-10-07 2026-03-25
email.spil.power.dk 5 2026-04-29 2026-08-27
cdn.power.dk 5 2026-04-16 2026-09-26
mcp.power.dk 3 2026-07-20 2026-09-15
customer.power.dk 5 2026-04-24 2026-08-22
t.customer.power.dk 5 2026-04-24 2026-08-22
collector.power.dk 4 2026-06-02 2026-08-01
load.collector.power.dk 6 2026-05-30 2026-05-30
s.power.dk 10 2026-05-19 2026-09-14
avis.power.dk 53 2026-04-20 2026-08-14
tilbudsavis.power.dk 21 2026-04-20 2026-08-14
link.mybusiness.power.dk 4 2026-04-16 2026-09-26
cdn.mybusiness.power.dk 5 2026-04-16 2026-09-23
collect.power.dk 3 2026-05-26 2026-09-12

Programmatic access: API GET /v1/hosts/power.dk (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/power.dk.