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.

14 hosts · 285 ms

HostCertsFirst seenLast seen
habitat.co.uk 2 2026-06-01 2026-06-01
a0fef32296f4d710.habitat.co.uk 3 2026-05-16 2026-08-30
fc.habitat.co.uk 9 2026-04-23 2026-09-10
feedback.habitat.co.uk 2 2025-07-18 2026-06-17
ink.habitat.co.uk 2 2026-04-14 2026-09-14
cdn.habitat.co.uk 1 2026-06-08 2026-06-08
cloud.emails.habitat.co.uk 1 2025-11-06 2025-11-06
image.emails.habitat.co.uk 2 2026-01-06 2026-01-14
click.emails.habitat.co.uk 1 2025-11-05 2025-11-05
pages.emails.habitat.co.uk 1 2025-11-06 2025-11-06
view.emails.habitat.co.uk 1 2025-11-06 2025-11-06
chat.habitat.co.uk 1 2026-06-01 2026-06-01
dmt.habitat.co.uk 5 2026-05-18 2026-09-27
www.habitat.co.uk 1 2026-06-01 2026-06-01

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