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.

7 hosts · 177 ms

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HostCertsFirst seenLast seen
dominos.dk 4 2026-02-18 2026-10-02
beta.dominos.dk 3 2026-02-22 2026-10-06
staging.dominos.dk 4 2026-02-18 2026-10-02
api-staging.dominos.dk 4 2026-02-22 2026-10-06
api.dominos.dk 4 2026-02-21 2026-10-05
dev.dominos.dk 1 2026-02-18 2026-02-18
www.dominos.dk 4 2026-02-20 2026-09-24

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