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.

4 hosts · 229 ms

HostCertsFirst seenLast seenDNS
indeedemail.com 30 2025-10-08 2026-08-30 ok
*.indeedemail.com 22 2025-10-08 2026-08-30 —
trail.indeedemail.com 6 2026-06-03 2026-10-01 ok
m.indeedemail.com 8 2026-04-18 2026-08-14 ok

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