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.

9 hosts · 318 ms

HostCertsFirst seenLast seenDNS
zonebourse.com 1 2025-10-08 2025-10-08 ok
*.zonebourse.com 1 2025-10-08 2025-10-08 —
live.zonebourse.com 3 2026-06-15 2026-09-09 ok
aff.zonebourse.com 6 2026-04-19 2026-08-16 ok
ch.zonebourse.com 3 2026-06-15 2026-09-09 ok
api.zonebourse.com 3 2026-06-15 2026-09-09 ok
cdn.zonebourse.com 8 2026-05-16 2026-09-11 ok
mrkt.zonebourse.com 1 2025-09-16 2025-09-16 nodata
www.zonebourse.com 3 2026-06-15 2026-09-09 ok

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