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.

8 hosts · 301 ms

HostCertsFirst seenLast seenDNS
liveaboard.com 2 2025-12-10 2026-02-06 ok
*.liveaboard.com 1 2026-02-06 2026-02-06 —
secure.liveaboard.com 3 2026-02-20 2026-10-04 ok
img.liveaboard.com 18 2026-04-12 2026-09-02 ok
login.liveaboard.com 3 2026-05-14 2026-09-26 ok
signup.liveaboard.com 2 2026-04-06 2026-07-29 ok
partners.liveaboard.com 2 2026-02-28 2026-06-21 ok
www.liveaboard.com 3 2025-12-10 2026-06-24 ok

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