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.

5 hosts · 219 ms

HostCertsFirst seenLast seen
valkyrietrading.com 5 2026-04-30 2026-08-28
rooms.valkyrietrading.com 3 2026-04-30 2026-08-18
www.valkyrietrading.com 5 2026-04-30 2026-08-28
pay.valkyrietrading.com 2 2026-09-17 2026-09-17
www.pay.valkyrietrading.com 2 2026-09-17 2026-09-17

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