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.

2 hosts · 188 ms

HostCertsFirst seenLast seenDNS
track.notifications.hod.care 10 2026-05-01 2026-08-29 ok
erp.notifications.hod.care 8 2026-06-04 2026-10-02 ok

Programmatic access, with DNS A records: API GET /v1/hosts/notifications.hod.care (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/notifications.hod.care.