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.

6 hosts · 323 ms

HostCertsFirst seenLast seenDNS
montanafreepress.org 23 2026-04-21 2026-10-03 ok
*.montanafreepress.org 20 2026-04-21 2026-09-25 —
shop.montanafreepress.org 4 2026-06-03 2026-10-01 ok
apps.montanafreepress.org 3 2026-03-03 2026-08-03 ok
projects.montanafreepress.org 3 2025-09-02 2026-09-29 ok
www.montanafreepress.org 7 2026-06-01 2026-10-03 ok

Programmatic access, with DNS A records: API GET /v1/hosts/montanafreepress.org (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/montanafreepress.org.