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.

8 hosts · 325 ms

HostCertsFirst seenLast seenDNS
luxrally.com 13 2026-03-18 2026-09-23 ok
*.luxrally.com 6 2026-04-26 2026-09-23 —
api.luxrally.com 1 2026-02-27 2026-02-27 ok
www.api.luxrally.com 1 2026-02-27 2026-02-27 nxdomain
cdn.luxrally.com 2 2026-03-18 2026-08-18 ok
mta-sts.luxrally.com 5 2026-09-11 2026-09-11 nxdomain
*.mta-sts.luxrally.com 5 2026-09-11 2026-09-11 —
www.luxrally.com 2 2026-03-18 2026-08-18 ok

Programmatic access, with DNS A records: API GET /v1/hosts/luxrally.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/luxrally.com.