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.

3 hosts · 290 ms

HostCertsFirst seenLast seenDNS
skinport.com 26 2026-04-15 2026-09-26 ok
*.skinport.com 26 2026-04-15 2026-09-26 —
status.skinport.com 5 2026-05-14 2026-09-10 ok

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