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.

4 hosts · 238 ms

HostCertsFirst seenLast seenDNS
golfkings.co.uk 20 2025-07-08 2026-09-18 ok
*.golfkings.co.uk 20 2025-07-08 2026-09-18 —
info.golfkings.co.uk 5 2026-05-11 2026-09-10 ok
help.golfkings.co.uk 4 2026-04-11 2026-08-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/golfkings.co.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/golfkings.co.uk.