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 · 314 ms

HostCertsFirst seenLast seenDNS
majestic.com 2 2025-07-14 2026-07-20 ok
*.majestic.com 2 2025-07-14 2026-07-20 —
try.majestic.com 10 2026-05-27 2026-09-22 ok

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