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 · 282 ms

HostCertsFirst seenLast seenDNS
fun4gatorkids.com 12 2026-05-08 2026-09-18 ok
newstrack.fun4gatorkids.com 2 2025-09-24 2026-08-25 ok
mail.fun4gatorkids.com 5 2026-04-26 2026-08-24 ok
webmail.fun4gatorkids.com 5 2026-04-26 2026-08-24 ok
www.fun4gatorkids.com 7 2026-05-20 2026-09-18 ok

Programmatic access, with DNS A records: API GET /v1/hosts/fun4gatorkids.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/fun4gatorkids.com.