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.

3 hosts · 275 ms

HostCertsFirst seenLast seen
salmedia.us 26 2026-04-20 2026-10-08
*.salmedia.us 26 2026-04-20 2026-10-08
webhost.salmedia.us 5 2026-05-31 2026-09-30

Programmatic access: API GET /v1/hosts/salmedia.us (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/salmedia.us.