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.

4 hosts · 356 ms

HostCertsFirst seenLast seenDNS
xdating.com 10 2026-05-29 2026-09-26 ok
*.xdating.com 10 2026-05-29 2026-09-26 —
live.xdating.com 12 2026-04-19 2026-08-16 ok
alerts.xdating.com 4 2026-06-09 2026-10-07 ok

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