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.

5 hosts · 273 ms

HostCertsFirst seenLast seenDNS
pga-ip.com 6 2025-10-02 2026-09-19 ok
*.pga-ip.com 2 2025-10-02 2026-09-07 —
wsp.pga-ip.com 1 2025-11-20 2025-11-20 ok
www.wsp.pga-ip.com 1 2025-11-20 2025-11-20 nxdomain
www.pga-ip.com 4 2026-04-18 2026-09-19 ok

Programmatic access, with DNS A records: API GET /v1/hosts/pga-ip.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/pga-ip.com.