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.

7 hosts · 225 ms

Download CSV
HostCertsFirst seenLast seen
playwsop.com 4 2026-01-28 2026-09-23
*.playwsop.com 2 2026-01-28 2026-01-28
fb-og-v2-prod.playwsop.com 15 2026-05-04 2026-08-18
preprod.playwsop.com 5 2026-06-23 2026-09-10
poker.playwsop.com 15 2026-05-04 2026-08-18
www.playwsop.com 5 2026-06-23 2026-09-10
pay.playwsop.com 15 2026-05-04 2026-08-18

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