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.

4 hosts · 254 ms

HostCertsFirst seenLast seenDNS
cyberani.org 25 2026-04-21 2026-09-28 ok
*.cyberani.org 6 2026-04-21 2026-08-17 —
www.cyberani.org 11 2026-06-04 2026-10-02 ok
pay.cyberani.org 10 2026-05-06 2026-09-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/cyberani.org (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/cyberani.org.