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 · 211 ms

HostCertsFirst seenLast seenDNS
petsdesjardins.com 9 2025-09-10 2026-09-14 ok
stg.petsdesjardins.com 1 2026-02-10 2026-02-10 nxdomain
www.stg.petsdesjardins.com 1 2026-02-10 2026-02-10 nxdomain
www.petsdesjardins.com 7 2025-09-10 2026-07-06 ok

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