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 · 284 ms

HostCertsFirst seenLast seenDNS
jjgaming.com 12 2026-03-03 2026-09-11 ok
*.jjgaming.com 12 2026-03-03 2026-09-11 —
jjconnect.jjgaming.com 2 2026-02-13 2026-07-07 ok
whatsnew.jjgaming.com 3 2026-04-07 2026-09-02 ok

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