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.

5 hosts · 283 ms

HostCertsFirst seenLast seenDNS
agapee.com 15 2026-04-17 2026-09-30 ok
dashboard.agapee.com 3 2026-04-16 2026-06-14 ok
api.agapee.com 2 2026-05-11 2026-05-11 ok
account.agapee.com 14 2026-05-16 2026-09-26 ok
www.agapee.com 15 2026-04-20 2026-09-30 ok

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