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 · 268 ms

HostCertsFirst seenLast seenDNS
link.post-service.applecash.apple 9 2026-05-10 2026-10-04 ok
link.service.applecash.apple 9 2026-05-10 2026-10-04 ok
learn.applecash.apple 17 2026-04-27 2026-09-27 ok
offers.applecash.apple 17 2026-04-27 2026-09-27 ok
try.applecash.apple 17 2026-04-27 2026-09-27 ok

Programmatic access, with DNS A records: API GET /v1/hosts/applecash.apple (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/applecash.apple.