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.

10 hosts · 225 ms

HostCertsFirst seenLast seenDNS
nortex.com 18 2026-04-13 2026-10-04 ok
*.nortex.com 2 2026-04-13 2026-09-29 —
patriot1.nortex.com 5 2026-05-26 2026-09-24 ok
unifi.nortex.com 5 2026-04-11 2026-08-11 ok
link.nortex.com 5 2026-05-09 2026-09-06 ok
ebill.nortex.com 4 2025-09-09 2026-06-10 ok
join.nortex.com 1 2025-12-29 2025-12-29 ok
es.nortex.com 6 2026-06-02 2026-10-01 ok
mta-sts.nortex.com 5 2026-05-05 2026-09-05 ok
www.nortex.com 6 2026-05-20 2026-09-15 ok

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