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.

3 hosts · 256 ms

HostCertsFirst seenLast seenDNS
kimono.email 8 2026-04-25 2026-09-18 ok
*.kimono.email 8 2026-04-25 2026-09-18 —
email.kimono.email 7 2026-05-19 2026-09-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/kimono.email (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/kimono.email.