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.

5 hosts · 340 ms

HostCertsFirst seenLast seenDNS
scuffers.com 17 2026-04-20 2026-10-01 ok
ffam.scuffers.com 1 2026-08-14 2026-08-14 nxdomain
returns.scuffers.com 5 2026-05-30 2026-09-27 ok
tochet.scuffers.com 1 2026-08-14 2026-08-14 ok
www.scuffers.com 20 2026-04-19 2026-10-01 ok

Programmatic access, with DNS A records: API GET /v1/hosts/scuffers.com (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/scuffers.com.