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.

5 hosts · 264 ms

HostCertsFirst seenLast seenDNS
bonidollars.ca 6 2025-07-17 2026-09-14 ok
pilote.bonidollars.ca 3 2025-08-28 2026-02-25 ok
dev.staging.bonidollars.ca 3 2025-08-28 2026-02-25 ok
dev.uat.bonidollars.ca 3 2025-08-28 2026-02-25 ok
www.bonidollars.ca 4 2025-07-17 2026-01-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/bonidollars.ca (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/bonidollars.ca.