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.

6 hosts · 356 ms

HostCertsFirst seenLast seenDNS
paycourt.com 17 2026-04-12 2026-09-18 ok
*.paycourt.com 8 2026-04-18 2026-09-18 —
va.paycourt.com 2 2025-08-19 2026-07-20 ok
link.paycourt.com 5 2026-05-26 2026-09-23 ok
www.paycourt.com 4 2026-04-12 2026-08-10 ok
pay.paycourt.com 2 2025-06-27 2026-05-28 nxdomain

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