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.

9 hosts · 353 ms

HostCertsFirst seenLast seenDNS
successionwealth.co.uk 5 2025-10-06 2026-09-22 ok
*.successionwealth.co.uk 2 2025-10-24 2026-09-22 —
people.successionwealth.co.uk 5 2025-07-30 2026-06-10 ok
staging.successionwealth.co.uk 5 2025-07-30 2026-06-10 ok
helpdesk.successionwealth.co.uk 7 2026-05-18 2026-09-14 ok
tools.successionwealth.co.uk 2 2026-02-23 2026-06-15 ok
careers.successionwealth.co.uk 2 2026-02-24 2026-06-16 ok
surveys.successionwealth.co.uk 10 2026-05-07 2026-09-03 ok
www.successionwealth.co.uk 5 2025-07-30 2026-06-10 ok

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