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.

10 hosts · 373 ms

HostCertsFirst seenLast seenDNS
justmenacing.com 13 2026-04-14 2026-09-27 ok
click.send.justmenacing.com 1 2026-09-15 2026-09-15 ok
cancel.justmenacing.com 10 2026-05-15 2026-09-10 ok
click.mail.justmenacing.com 1 2026-09-22 2026-09-22 ok
secureorder.justmenacing.com 10 2026-05-15 2026-09-11 ok
click.updates.justmenacing.com 1 2026-09-15 2026-09-15 ok
t.justmenacing.com 4 2026-04-10 2026-08-08 ok
account.justmenacing.com 17 2026-04-07 2026-10-02 ok
click.support.justmenacing.com 1 2026-09-15 2026-09-15 ok
www.justmenacing.com 18 2026-04-14 2026-09-26 ok

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