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 · 199 ms

HostCertsFirst seenLast seenDNS
em.angi.com 25 2026-02-08 2026-09-16 ok
*.em.angi.com 14 2026-05-13 2026-09-16 —
www.em.angi.com 1 2026-02-08 2026-02-08 nxdomain

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