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.

6 hosts · 321 ms

HostCertsFirst seenLast seenDNS
devrank.co 10 2026-03-12 2026-08-28 ok
pae-api-dinamometria.devrank.co 3 2026-05-22 2026-08-31 ok
time.devrank.co 5 2026-05-26 2026-09-24 ok
pae-api-dinamometria-dev.devrank.co 3 2026-05-22 2026-09-04 ok
trksnov.devrank.co 6 2026-04-19 2026-09-25 ok
www.devrank.co 10 2026-03-12 2026-08-28 ok

Programmatic access, with DNS A records: API GET /v1/hosts/devrank.co (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/devrank.co.