Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

5 hosts · 332 ms

HostCertsFirst seenLast seenDNS
starx.media 11 2026-05-19 2026-09-14 ok
launch.starx.media 13 2026-04-13 2026-09-24 ok
portal.starx.media 11 2026-04-13 2026-09-24 ok
collect.starx.media 2 2026-04-28 2026-04-28 ok
www.starx.media 12 2026-05-23 2026-09-18 ok

Programmatic access, with DNS A records: API GET /v1/hosts/starx.media (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/starx.media.