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 · 289 ms

HostCertsFirst seenLast seenDNS
kickingworld.com 21 2026-04-16 2026-10-04 ok
*.kickingworld.com 17 2026-04-26 2026-10-04 —
host.kickingworld.com 4 2026-04-17 2026-08-15 ok
www.kickingworld.com 4 2026-04-16 2026-08-14 ok

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