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.

3 hosts · 178 ms

HostCertsFirst seenLast seen
piratekingsgame.com 2 2026-09-23 2026-09-23
dev.piratekingsgame.com 3 2026-01-28 2026-09-23
*.dev.piratekingsgame.com 1 2026-01-28 2026-01-28

Programmatic access: API GET /v1/hosts/piratekingsgame.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/piratekingsgame.com.