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 · 300 ms

HostCertsFirst seenLast seen
decaspa.com 1 2026-04-30 2026-04-30
*.decaspa.com 1 2026-04-30 2026-04-30
vettori.decaspa.com 5 2026-05-15 2026-09-26
mta-sts.decaspa.com 5 2026-05-01 2026-08-27

Programmatic access: API GET /v1/hosts/decaspa.com (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/decaspa.com.