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.

17 hosts · 420 ms

HostCertsFirst seenLast seenDNS
exsitec.dk 11 2026-04-28 2026-09-05 ok
ztna.exsitec.dk 5 2026-04-12 2026-09-29 ok
maintenance-agent-api-prod.exsitec.dk 3 2026-02-22 2026-10-06 ok
maintenance-deployment-api-prod.exsitec.dk 2 2026-02-23 2026-06-15 ok
inside.exsitec.dk 8 2026-04-30 2026-08-26 ok
karriere.exsitec.dk 11 2026-04-27 2026-09-24 ok
excore.exsitec.dk 10 2026-05-07 2026-09-02 ok
link.exsitec.dk 4 2026-04-19 2026-08-17 ok
funnordic-admin.exsitec.dk 5 2026-06-04 2026-09-23 ok
serwent-admin.exsitec.dk 6 2026-04-18 2026-10-01 ok
cipp.exsitec.dk 2 2026-02-18 2026-07-10 ok
secret.exsitec.dk 6 2026-05-31 2026-09-29 ok
maintenance-agent-api-test.exsitec.dk 2 2026-02-24 2026-06-16 ok
maintenance-deployment-api-test.exsitec.dk 3 2026-02-18 2026-10-02 ok
funnordic-admin-test.exsitec.dk 5 2026-05-08 2026-08-26 ok
serwent-admin-test.exsitec.dk 6 2026-04-18 2026-10-01 ok
www.exsitec.dk 9 2026-04-28 2026-08-26 ok

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