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.

4 hosts · 145 ms

HostCertsFirst seenLast seen
xtb.es 5 2026-04-29 2026-08-25
i.xtb.es 5 2026-05-06 2026-09-02
l.xtb.es 5 2026-05-06 2026-09-02
www.xtb.es 5 2026-04-29 2026-08-25

Programmatic access: API GET /v1/hosts/xtb.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/xtb.es.