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.

4 hosts · 258 ms

HostCertsFirst seenLast seen
nordprotect.com 13 2026-05-20 2026-09-15
*.nordprotect.com 14 2025-12-04 2026-09-15
cm.nordprotect.com 8 2026-05-06 2026-07-11
support.nordprotect.com 1 2026-04-20 2026-04-20

Programmatic access: API GET /v1/hosts/nordprotect.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/nordprotect.com.