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 · 209 ms

HostCertsFirst seenLast seenDNS
gold-traders.co.uk 1 2025-09-15 2025-09-15 ok
go.gold-traders.co.uk 5 2026-04-21 2026-08-17 ok
mta-sts.gold-traders.co.uk 4 2026-04-12 2026-08-10 ok
support.gold-traders.co.uk 27 2026-05-08 2026-09-18 ok
dev.gold-traders.co.uk 4 2026-04-13 2026-08-11 ok
www.gold-traders.co.uk 1 2025-09-15 2025-09-15 ok

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