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.

3 hosts · 262 ms

HostCertsFirst seenLast seenDNS
kauaishoreshotel.com 16 2026-04-16 2026-09-25 ok
*.kauaishoreshotel.com 9 2026-04-26 2026-09-25 —
www.kauaishoreshotel.com 8 2026-04-14 2026-08-10 ok

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