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.

8 hosts · 319 ms

HostCertsFirst seenLast seenDNS
ghh.org.uk 13 2026-04-26 2026-09-21 ok
*.ghh.org.uk 8 2026-05-23 2026-09-21 —
portal.ghh.org.uk 10 2026-04-20 2026-08-17 ok
mail.ghh.org.uk 5 2026-04-26 2026-08-26 ok
images.ghh.org.uk 8 2026-05-20 2026-09-15 ok
orphan-photos.ghh.org.uk 10 2026-05-15 2026-09-10 ok
partners.ghh.org.uk 4 2026-04-16 2026-08-16 ok
www.ghh.org.uk 5 2026-04-26 2026-08-26 ok

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