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 · 380 ms

HostCertsFirst seenLast seenDNS
volka.com 18 2026-04-15 2026-09-30 ok
*.volka.com 18 2026-04-15 2026-09-30 —
stora.volka.com 1 2026-07-14 2026-07-14 ok
asterdrive.volka.com 1 2026-09-02 2026-09-02 ok

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