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.

20 hosts · 406 ms

HostCertsFirst seenLast seenDNS
releaf.co.uk 12 2026-05-08 2026-10-01 ok
*.releaf.co.uk 6 2026-05-08 2026-09-03 —
clinic.releaf.co.uk 2 2026-04-02 2026-09-14 ok
police.releaf.co.uk 5 2026-05-16 2026-09-17 ok
staging.releaf.co.uk 5 2026-05-23 2026-09-23 ok
l.releaf.co.uk 5 2026-05-13 2026-09-15 ok
admin.releaf.co.uk 5 2026-05-16 2026-09-22 ok
staging-admin.releaf.co.uk 5 2026-06-01 2026-10-03 ok
staging-integration.releaf.co.uk 5 2026-05-26 2026-09-28 ok
ep.releaf.co.uk 7 2026-07-24 2026-09-21 ok
rewards.releaf.co.uk 3 2025-08-19 2026-09-07 ok
cms.releaf.co.uk 5 2026-04-23 2026-08-21 ok
rs.releaf.co.uk 5 2026-05-15 2026-09-12 ok
assets.releaf.co.uk 10 2026-04-13 2026-08-10 ok
dev-assets.releaf.co.uk 11 2026-05-23 2026-09-18 ok
mta-sts.releaf.co.uk 4 2026-06-19 2026-08-17 ok
consult.releaf.co.uk 6 2026-07-02 2026-08-30 ok
staging-admin-start.releaf.co.uk 2 2026-07-28 2026-07-28 nxdomain
www.releaf.co.uk 4 2026-04-21 2026-08-23 ok
quiz.releaf.co.uk 2 2026-08-26 2026-08-26 ok

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