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.

10 hosts · 229 ms

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HostCertsFirst seenLast seen
casumo.es 18 2026-05-01 2026-09-27
*.casumo.es 18 2026-05-01 2026-09-27
sports2.casumo.es 1 2026-09-02 2026-09-02
restricted.casumo.es 13 2026-06-17 2026-10-13
maintenance.casumo.es 9 2026-06-16 2026-10-12
blog.casumo.es 18 2026-05-15 2026-09-10
sportsapi.casumo.es 1 2026-09-02 2026-09-02
applink.casumo.es 18 2026-06-16 2026-10-12
lp.casumo.es 13 2026-05-19 2026-09-15
tr.casumo.es 4 2026-06-14 2026-09-29

Programmatic access: API GET /v1/hosts/casumo.es (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/casumo.es.