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 · 275 ms

HostCertsFirst seenLast seenDNS
cloud.accounts.goaaa.com 1 2026-08-06 2026-08-06 ok
image.accounts.goaaa.com 28 2026-08-06 2026-09-30 ok
click.accounts.goaaa.com 1 2026-08-06 2026-08-06 ok
view.accounts.goaaa.com 1 2026-08-06 2026-08-06 ok

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