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.

6 hosts · 374 ms

HostCertsFirst seenLast seenDNS
sprintlaw.co.uk 21 2026-05-15 2026-10-02 ok
*.sprintlaw.co.uk 14 2026-05-15 2026-09-21 —
staging.sprintlaw.co.uk 1 2026-04-19 2026-04-19 ok
sign.sprintlaw.co.uk 2 2026-02-22 2026-07-10 ok
t.sprintlaw.co.uk 5 2026-05-31 2026-09-17 ok
www.sprintlaw.co.uk 4 2026-06-03 2026-10-06 ok

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