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.

7 hosts · 276 ms

HostCertsFirst seenLast seenDNS
mox.com 3 2025-06-13 2026-05-13 ok
vdp.mox.com 15 2026-04-28 2026-09-02 ok
cloud.mailer.mox.com 1 2026-01-21 2026-01-21 ok
image.mailer.mox.com 5 2026-02-14 2026-09-21 ok
click.mailer.mox.com 1 2026-01-21 2026-01-21 ok
view.mailer.mox.com 1 2026-01-21 2026-01-21 ok
www.mox.com 5 2025-06-13 2026-05-22 ok

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