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.

10 hosts · 422 ms

Download CSV
HostCertsFirst seenLast seen
nurseregistry.com 23 2026-05-01 2026-09-27
*.nurseregistry.com 18 2026-05-01 2026-09-18
www2.nurseregistry.com 10 2026-04-28 2026-09-25
rscloud.nurseregistry.com 5 2026-04-27 2026-08-25
private-nurse.nurseregistry.com 10 2026-04-24 2026-09-21
staffing.nurseregistry.com 10 2026-04-28 2026-09-25
plus.nurseregistry.com 9 2026-04-20 2026-09-17
support.nurseregistry.com 7 2026-06-03 2026-10-01
www.nurseregistry.com 5 2026-05-30 2026-09-27
apply.nurseregistry.com 10 2026-04-24 2026-09-21

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