Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

8 hosts · 272 ms

HostCertsFirst seenLast seen
rootsplants.co.uk 16 2026-04-15 2026-09-29
*.rootsplants.co.uk 11 2026-04-15 2026-09-29
trk.rootsplants.co.uk 8 2026-05-02 2026-08-28
supplierportal.rootsplants.co.uk 1 2026-02-20 2026-02-20
sms.rootsplants.co.uk 12 2026-05-10 2026-09-05
ss.rootsplants.co.uk 4 2026-05-28 2026-09-16
account.rootsplants.co.uk 5 2026-05-17 2026-09-13
www.rootsplants.co.uk 5 2026-06-02 2026-09-29

Programmatic access: API GET /v1/hosts/rootsplants.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/rootsplants.co.uk.