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.

31 hosts · 248 ms

HostCertsFirst seenLast seen
boligsiden.dk 25 2025-07-06 2026-10-04
*.boligsiden.dk 4 2025-07-06 2026-06-05
auth-realtor-v2.boligsiden.dk 2 2025-08-24 2026-07-25
auth-v3.boligsiden.dk 2 2026-04-26 2026-09-26
ftp9.boligsiden.dk 5 2026-05-05 2026-09-03
a.boligsiden.dk 4 2026-04-14 2026-09-01
intra.boligsiden.dk 5 2026-05-30 2026-09-27
www.intra.boligsiden.dk 5 2026-05-30 2026-09-27
data.boligsiden.dk 4 2026-04-18 2026-09-05
lab.boligsiden.dk 1 2026-09-04 2026-09-04
web.boligsiden.dk 2 2026-04-30 2026-09-30
minside.boligsiden.dk 2 2026-04-30 2026-09-30
data.cache.boligsiden.dk 2 2025-06-20 2026-05-20
home.boligsiden.dk 2 2025-08-18 2026-07-19
affiliate.boligsiden.dk 4 2026-04-14 2026-09-01
udlejning.boligsiden.dk 6 2026-06-16 2026-08-14
notifications-push.boligsiden.dk 2 2026-05-04 2026-10-04
api.boligsiden.dk 18 2026-04-11 2026-10-06
rental-api.boligsiden.dk 2 2026-04-28 2026-09-28
testapi.boligsiden.dk 8 2026-05-11 2026-09-07
api-internal.boligsiden.dk 1 2026-09-30 2026-09-30
chatgpt-app.boligsiden.dk 1 2025-11-20 2025-11-20
images.boligsiden.dk 1 2025-12-05 2025-12-05
links.boligsiden.dk 4 2026-05-12 2026-09-04
notifications.boligsiden.dk 2 2026-05-04 2026-10-04
apps.boligsiden.dk 4 2026-06-09 2026-10-06
rental-documents.boligsiden.dk 1 2025-11-30 2025-11-30
reports.boligsiden.dk 2 2025-09-21 2026-08-22
status.boligsiden.dk 5 2026-04-16 2026-09-23
import.boligsiden.dk 2 2026-03-03 2026-07-19
www.boligsiden.dk 16 2025-07-06 2026-10-05

Programmatic access: API GET /v1/hosts/boligsiden.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/boligsiden.dk.