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 · 299 ms

HostCertsFirst seenLast seenDNS
pinterest.com 7 2025-07-23 2026-08-14 ok
*.pinterest.com 9 2025-07-23 2026-09-11 —
*.testing.pinterest.com 8 2025-07-23 2026-09-11 —

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