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 · 282 ms

HostCertsFirst seenLast seenDNS
equaleats.com 14 2026-05-18 2026-09-29 ok
account.equaleats.com 5 2026-04-07 2026-10-02 ok
www.equaleats.com 13 2026-05-18 2026-09-29 ok

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