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 · 173 ms

Download CSV
HostCertsFirst seenLast seen
t.prettylittercats.com 1 2025-12-10 2025-12-10
l.t.prettylittercats.com 1 2025-12-10 2025-12-10
w.t.prettylittercats.com 1 2025-12-10 2025-12-10
x.t.prettylittercats.com 1 2025-12-10 2025-12-10

Programmatic access: API GET /v1/hosts/t.prettylittercats.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/t.prettylittercats.com.