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.

10 hosts · 307 ms

HostCertsFirst seenLast seenDNS
konnybaby.com 14 2026-01-04 2026-09-28 ok
*.konnybaby.com 1 2026-01-04 2026-01-04 —
id.konnybaby.com 14 2026-05-17 2026-09-27 ok
*.tracking.konnybaby.com 1 2026-01-04 2026-01-04 —
trk.konnybaby.com 6 2026-06-20 2026-08-18 ok
cn.konnybaby.com 17 2026-05-19 2026-09-30 ok
jp.konnybaby.com 11 2026-05-16 2026-09-24 ok
partners.konnybaby.com 3 2026-05-26 2026-09-23 ok
account.konnybaby.com 11 2026-05-25 2026-10-04 ok
www.konnybaby.com 13 2026-05-16 2026-09-25 ok

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