Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

60 hosts · 413 ms

HostCertsFirst seenLast seenDNS
tdcnet.dk 9 2026-05-31 2026-09-26 ok
fedqa.tdcnet.dk 1 2026-06-08 2026-06-08 ok
fed.tdcnet.dk 1 2026-06-08 2026-06-08 ok
tbird.tdcnet.dk 3 2026-06-29 2026-09-10 ok
dashboard-pre.netbird.tdcnet.dk 1 2026-01-27 2026-01-27 ok
signal-pre.netbird.tdcnet.dk 1 2026-01-27 2026-01-27 ok
management-pre.netbird.tdcnet.dk 1 2026-01-27 2026-01-27 ok
relay-pre.netbird.tdcnet.dk 1 2026-01-27 2026-01-27 ok
myview-preprd.tdcnet.dk 1 2026-01-16 2026-01-16 ok
workspace.tdcnet.dk 1 2026-06-01 2026-06-01 ok
service.tdcnet.dk 2 2025-08-01 2026-09-07 ok
www.service.tdcnet.dk 1 2026-09-07 2026-09-07 nodata
info.partnerservice.tdcnet.dk 3 2026-05-30 2026-08-08 ok
ramsitemobile.tdcnet.dk 2 2026-08-14 2026-08-14 nodata
api-pre.tdcnet.dk 6 2026-03-18 2026-09-16 ok
ramsite.tdcnet.dk 2 2026-08-14 2026-08-14 nodata
myview-staging.tdcnet.dk 1 2026-01-09 2026-01-09 ok
marketing.tdcnet.dk 3 2026-06-12 2026-08-21 ok
api.tdcnet.dk 4 2026-03-18 2026-09-16 ok
api-pre-global.tdcnet.dk 4 2025-09-11 2026-09-16 ok
api-global.tdcnet.dk 4 2025-09-11 2026-09-16 ok
api-trn-global.tdcnet.dk 3 2025-09-11 2026-09-17 ok
api-sit-global.tdcnet.dk 4 2025-09-11 2026-09-16 ok
api-dev-global.tdcnet.dk 4 2025-09-11 2026-09-16 ok
vvm.tdcnet.dk 2 2025-08-28 2026-07-30 ok
hcportalen.tdcnet.dk 10 2026-04-27 2026-08-23 ok
dev-hcportalen.tdcnet.dk 8 2026-04-27 2026-08-24 ok
checkin.tdcnet.dk 6 2026-06-02 2026-09-30 ok
info.tdcnet.dk 4 2026-04-14 2026-09-01 ok
t-tekmap.tdcnet.dk 1 2025-08-26 2025-08-26 ok
vdp.tdcnet.dk 15 2026-04-29 2026-09-02 ok
service.pp.tdcnet.dk 1 2026-06-18 2026-06-18 ok
www.service.pp.tdcnet.dk 1 2026-06-18 2026-06-18 nodata
fiber.tdcnet.dk 4 2026-04-12 2026-08-30 ok
nyheder.tdcnet.dk 4 2026-04-12 2026-08-30 ok
partner.tdcnet.dk 13 2026-05-21 2026-09-16 ok
stag-partner.tdcnet.dk 13 2026-05-22 2026-09-18 ok
dev-partner.tdcnet.dk 10 2026-05-21 2026-09-16 ok
developer.tdcnet.dk 4 2025-10-22 2026-09-16 ok
stag-developer.tdcnet.dk 14 2026-05-23 2026-09-19 ok
dev-developer.tdcnet.dk 13 2026-05-22 2026-09-17 ok
qr.tdcnet.dk 8 2026-04-22 2026-08-18 ok
hr-analytics.tdcnet.dk 5 2026-05-12 2026-09-15 ok
docs.tdcnet.dk 2 2025-07-21 2026-07-06 ok
t-docs.tdcnet.dk 2 2025-07-21 2026-07-06 ok
tasks.tdcnet.dk 2 2025-07-21 2026-07-06 ok
t-tasks.tdcnet.dk 2 2025-07-21 2026-07-06 ok
advisors.tdcnet.dk 4 2026-04-16 2026-08-14 ok
www.advisors.tdcnet.dk 4 2026-04-16 2026-08-14 ok
stag-tdcnet.tdcnet.dk 12 2026-04-28 2026-08-24 ok
dev-tdcnet.tdcnet.dk 10 2026-04-27 2026-08-23 ok
developer-sit.tdcnet.dk 6 2025-10-22 2026-09-16 ok
fedtest.tdcnet.dk 1 2026-06-08 2026-06-08 ok
pentest.tdcnet.dk 9 2026-04-10 2026-08-27 ok
www.pentest.tdcnet.dk 9 2026-04-10 2026-08-27 ok
sst.tdcnet.dk 5 2026-05-15 2026-09-12 ok
myview.tdcnet.dk 1 2026-01-16 2026-01-16 ok
www.tdcnet.dk 13 2026-05-30 2026-09-25 ok
survey.tdcnet.dk 5 2026-05-12 2026-08-17 ok
www.survey.tdcnet.dk 5 2026-05-12 2026-09-15 ok

Programmatic access, with DNS A records: API GET /v1/hosts/tdcnet.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/tdcnet.dk.