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.

6 hosts · 272 ms

HostCertsFirst seenLast seenDNS
canningvale.com 11 2025-08-25 2026-09-01 ok
blog.canningvale.com 4 2026-04-18 2026-08-16 ok
api.canningvale.com 1 2026-02-04 2026-02-04 ok
link.canningvale.com 4 2026-04-17 2026-08-15 ok
cfjump.canningvale.com 5 2026-05-24 2026-09-21 ok
www.canningvale.com 13 2025-08-25 2026-09-01 ok

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