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 · 322 ms

HostCertsFirst seenLast seenDNS
gomokka.com 3 2026-06-04 2026-07-27 ok
*.gomokka.com 2 2025-12-18 2026-05-20 —
blog.gomokka.com 2 2026-09-24 2026-09-24 ok
trail.gomokka.com 4 2026-04-11 2026-08-08 ok
trust.gomokka.com 5 2026-05-20 2026-09-07 ok

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