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.

10 hosts · 328 ms

HostCertsFirst seenLast seenDNS
ohaus.com 4 2025-09-08 2026-05-19 ok
*.ohaus.com 4 2025-09-08 2026-05-19 —
trck.online.ohaus.com 5 2026-05-14 2026-09-10 ok
go.online.ohaus.com 5 2026-05-14 2026-09-10 ok
app.online.ohaus.com 5 2026-05-14 2026-09-10 ok
images.online.ohaus.com 5 2026-05-11 2026-09-10 ok
literature.ohaus.com 6 2026-05-21 2026-09-16 ok
go.ohaus.com 5 2026-05-07 2026-09-02 ok
partnershop.ohaus.com 3 2025-09-05 2026-05-19 nodata
*.partnershop.ohaus.com 3 2025-09-05 2026-05-19 —

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