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 · 227 ms

HostCertsFirst seenLast seenDNS
*.shopping.comms.yahoo.com 18 2026-05-18 2026-09-29 —
ca.shopping.comms.yahoo.com 2 2026-04-27 2026-09-29 ok
e.shopping.comms.yahoo.com 2 2026-04-27 2026-09-29 ok
images.shopping.comms.yahoo.com 2 2026-04-27 2026-09-29 ok
view.shopping.comms.yahoo.com 2 2026-04-27 2026-09-29 ok

Programmatic access, with DNS A records: API GET /v1/hosts/shopping.comms.yahoo.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/shopping.comms.yahoo.com.