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.

3 hosts · 430 ms

HostCertsFirst seenLast seenDNS
divine.inc 5 2026-05-26 2026-09-23 ok
writing.divine.inc 6 2026-06-25 2026-10-03 ok
careers.divine.inc 3 2026-04-01 2026-08-27 ok

Programmatic access, with DNS A records: API GET /v1/hosts/divine.inc (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/divine.inc.