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 · 328 ms

HostCertsFirst seenLast seenDNS
whitepeakdigital.com 9 2026-06-06 2026-10-02 ok
*.whitepeakdigital.com 9 2026-06-06 2026-10-02 —
news.whitepeakdigital.com 5 2026-05-26 2026-09-22 ok

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