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 · 300 ms

HostCertsFirst seenLast seenDNS
sparkleinpink.com 13 2026-05-16 2026-09-25 ok
account.sparkleinpink.com 11 2026-05-06 2026-09-15 ok
www.sparkleinpink.com 13 2026-05-15 2026-09-25 ok
privacy.sparkleinpink.com 5 2026-05-12 2026-09-12 ok

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