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 · 217 ms

HostCertsFirst seenLast seenDNS
oteemo.com 12 2026-04-24 2026-09-06 ok
*.oteemo.com 12 2026-04-24 2026-09-06 —
axiomin-admin.oteemo.com 1 2026-08-25 2026-08-25 ok
axiomin.oteemo.com 1 2026-08-12 2026-08-12 ok

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