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.

6 hosts · 289 ms

HostCertsFirst seenLast seenDNS
autodiscover.luxcontrol.com 3 2026-04-06 2026-09-09 nxdomain
sa-test.luxcontrol.com 4 2026-04-21 2026-08-19 servfail
asbl-test.luxcontrol.com 4 2026-04-21 2026-08-19 ok
ext-test.luxcontrol.com 5 2026-05-31 2026-09-28 ok
ext.luxcontrol.com 5 2026-05-31 2026-09-28 ok
www.luxcontrol.com 5 2026-05-31 2026-09-28 ok

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