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 · 365 ms

HostCertsFirst seenLast seenDNS
topaesthetics.com 9 2026-04-30 2026-09-27 ok
click.topaesthetics.com 1 2026-08-02 2026-08-02 ok
ps.topaesthetics.com 7 2026-05-06 2026-09-27 ok
click.news.topaesthetics.com 1 2026-08-02 2026-08-02 ok
www.topaesthetics.com 9 2026-04-30 2026-09-27 ok

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