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 · 307 ms

HostCertsFirst seenLast seenDNS
carolinesvedbom.com 16 2026-05-17 2026-09-26 ok
subscribe.carolinesvedbom.com 5 2026-05-06 2026-09-02 ok
no.carolinesvedbom.com 18 2026-05-18 2026-09-27 ok
eu.carolinesvedbom.com 16 2026-05-17 2026-09-27 ok
www.carolinesvedbom.com 9 2026-05-17 2026-09-13 ok

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