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.

28 hosts · 612 ms

HostCertsFirst seenLast seenDNS
hiddenhearing.co.uk 7 2025-07-08 2026-09-29 ok
web.hiddenhearing.co.uk 2 2025-10-17 2026-10-07 ok
www.web.hiddenhearing.co.uk 2 2025-10-17 2026-10-07 nxdomain
helpdesk.hiddenhearing.co.uk 11 2026-04-22 2026-08-18 ok
email.hiddenhearing.co.uk 1 2025-12-22 2025-12-22 ok
www.email.hiddenhearing.co.uk 1 2025-12-22 2025-12-22 nxdomain
mdm.hiddenhearing.co.uk 1 2026-03-30 2026-03-30 nodata
*.mdm.hiddenhearing.co.uk 1 2026-03-30 2026-03-30 —
sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nodata
*.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 —
authenticated.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 ok
www.authenticated.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nxdomain
npscalling.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 ok
www.npscalling.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nxdomain
monitoring.sp.hiddenhearing.co.uk 2 2026-04-23 2026-04-23 ok
www.monitoring.sp.hiddenhearing.co.uk 2 2026-04-23 2026-04-23 nxdomain
postcodelookup.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 ok
www.postcodelookup.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nxdomain
stockorders.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 ok
www.stockorders.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nxdomain
ssrs.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 ok
www.ssrs.sp.hiddenhearing.co.uk 3 2026-04-22 2026-10-08 nxdomain
hhukftp.hiddenhearing.co.uk 1 2025-11-10 2025-11-10 ok
www.hhukftp.hiddenhearing.co.uk 1 2025-11-10 2025-11-10 nxdomain
hhuk-connect.hiddenhearing.co.uk 4 2026-04-22 2026-10-08 ok
www.hhuk-connect.hiddenhearing.co.uk 4 2026-04-22 2026-10-08 nxdomain
www.hiddenhearing.co.uk 5 2025-07-08 2026-07-02 ok
my.hiddenhearing.co.uk 6 2026-04-22 2026-08-18 ok

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