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 · 283 ms

HostCertsFirst seenLast seenDNS
roboticimaging.com 6 2026-05-29 2026-09-23 ok
assets.roboticimaging.com 8 2026-04-16 2026-08-13 ok
www.roboticimaging.com 5 2026-05-30 2026-09-22 ok
sandbox.roboticimaging.com 3 2026-06-08 2026-10-05 ok

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