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 · 269 ms

HostCertsFirst seenLast seenDNS
kingsburycontrolcentre.co.uk 1 2026-05-09 2026-05-09 ok
mta-sts.kingsburycontrolcentre.co.uk 2 2025-08-17 2026-07-18 ok
www.kingsburycontrolcentre.co.uk 1 2026-05-12 2026-05-12 ok

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